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Efficacy of coenzyme Q10 for improved tolerability of cancer treatments: a systematic review.

PURPOSE: The aim of this systematic review was to summarize and evaluate the evidence available for oral supplementation with coenzyme Q10 (CoQ10) to improve the tolerability of cancer treatments. MATERIALS AND METHODS: Searches for all published and unpublished controlled trials were carried out on seven databases. Manufacturers of CoQ10 were identified and contacted. Controlled clinical trials of monopreparations of CoQ10 administered orally to cancer patients were included. No language restrictions were imposed. Data were extracted independently by two authors according to predefined criteria. RESULTS: Six studies were included in the review, including three randomized clinical trials and three nonrandomized clinical trials. Patients in five of six studies received anthracyclines. The results suggested that CoQ10 provides some protection against cardiotoxicity or liver toxicity during cancer treatment. However, because of inadequate reporting and analysis, as well as questionable validity of outcome measures, the results are not conclusive. CONCLUSION: Suggestions that CoQ10 might reduce the toxicity of cancer treatments have not been tested by rigorous trials. Further investigations are necessary to determine whether CoQ10 can improve the tolerability of cancer treatments.

Antineoplastic Agents↗

Is there a sound basis for deciding how many dentists should be trained to meet the dental needs of the Canadian population? Systematic review of literature (1968-1999).

A systematic review was conducted of the literature on human resources planning (HRP) in dentistry in Canada, critically assessing the scientific strength of 1968-1999 publications. Inclusion and exclusion criteria were applied to 176 peer-reviewed publications and "grey literature" reports. Thirty papers were subsequently assessed for strength of design and relevance of evidence to objectively address HRP. Twelve papers were position statements or experts' reports not amenable for inclusion in the system. Of the remaining 18 papers, 4 were classified as projections from manpower-to-population ratios, 4 as dental practitioner opinion surveys, 8 as estimates of requisite demand to absorb current capacity and 2 as need-based, demand-weighted studies. Within the 30.5 years reviewed, 53.4% of papers were published between 1982 and 1987. Overall, many papers called for a reduction in human resources, a message that dominated HRP during the 1980s, or noted an increase in the demand for services. HRP publications often had questionable strength or analytic frameworks. The paradigm of busyness-scarcity evolved from a belief around an economic model for the profession into a fundamental tenet of HRP. A formal analysis to establish its existence beyond arbitrary dentist:population ratios has usually been lacking.

Canada↗

Long-acting medications for the hyperkinetic disorders. A systematic review and European treatment guideline.

A systematic review of published and unpublished data on the use of long-acting medications in ADHD and hyperkinetic disorder is reported, giving effect sizes and numbers-to-treat for extended-release stimulant preparations and atomoxetine (ATX). A panel of experts from several European countries used the review to make recommendations about the use of these drugs in practice, and conclusions are reported: (1) Long-acting preparations should be available and used; (2) They should not replace short-acting drugs (which will be the initial treatment for many children for reasons of cost and flexibility of dosing). Individual clinical choice is needed. (3) Both ATX and extended-release preparations of stimulants should be available. The choice will depend upon the circumstances, and detailed recommendations are made.

Atomoxetine Hydrochloride↗

Rehabilitation for Parkinson's disease: a systematic review of available evidence.

OBJECTIVE: To systematically review the available evidence on the effectiveness of nonpharmacological rehabilitation interventions for people with Parkinson's disease, and identify future research needs. DESIGN: Electronic searches of four databases (CINAHL, Cochrane Library, MEDLINE, PsychLIT) 1980-2002; examination of reference lists of relevant papers. Controlled trials and observational studies were included. Data extraction and quality assessment of papers by two independent reviewers. A narrative review. SETTING: Rehabilitation interventions delivered either in subjects' own homes, or in clinical settings as outpatients. SUBJECTS: Community-living adults with Parkinson's disease. INTERVENTIONS: Physiotherapy, occupational therapy, speech and language therapy, psychological counselling and support, and education. MAIN MEASURES: A range of outcomes: mobility, functional status, speech, swallowing, psychological well-being, as determined by the studies included in the review. RESULTS: Forty-four different studies (reported in 51 papers) were included (25 physiotherapy, 4 occupational therapy, 10 speech and language therapy, 3 psychological counselling, 1 educational, 1 multidisciplinary). All studies, except one, reported improvements on at least one outcome measure. CONCLUSIONS: Findings may reflect publication bias, but suggest interventions can affect patients' lives for the better in a variety of ways. It is difficult to interpret the clinical importance of statistically significant improvements reported in most studies. There is a need for methodologically more robust research with meaningful follow-up periods, designed in a manner that separates specific and nonspecific effects. Cost-effectiveness evidence is required to provide clear guidance on service extensions.

Humans↗

The clinical and cost-effectiveness of left ventricular assist devices for end-stage heart failure: a systematic review and economic evaluation.

OBJECTIVES: To assess the clinical and cost-effectiveness of left ventricular assist devices (LVADs) as a bridge to heart transplantation (BTT), as a bridge to myocardial recovery (BTR) or as a long-term chronic support (LTCS) for people with end-stage heart failure (ESHF). DATA SOURCES: For the systematic review, electronic databases and bibliographies of related publications plus experts and manufacturers. For the economic evaluations, data originated from the systematic review of clinical and cost-effectiveness, UK hospitals, device manufacturers and expert opinion. REVIEW METHODS: For the systematic review, studies were selected and assessed against a set of rigorous criteria; data were then synthesised using a narrative approach through subgroup analysis based on the indication for treatment, type of LVAD and quality of studies. The economic evaluation developed two models to evaluate the use of LVADs, first as a BTT and second as LTCS for patients suffering from ESHF. RESULTS: Sixteen studies assessed the clinical effectiveness of LVADs as a BTT. Despite the poor methodological quality of the evidence, LVADs appeared beneficial compared to other treatment options (i.e. inotropic agents or usual care) or to no care (i.e. the natural history of ESHF) improving the survival of people with ESHF during the period of support and following heart transplantation. Patients supported by an LVAD appeared to have an improved functional status compared with those on usual care and experienced an improvement in their quality of life from before device implantation to the period during support. Serious adverse events are a risk for patients with an LVAD. With a scarcity of evidence directly comparing different devices, it is difficult to identify specific devices as the most clinically effective. The HeartMate LVAD is the only device that has evidence comparing it with the different alternatives, appearing to be more clinically effective than inotropic agents and usual care and as clinically effective as the Novacor device. Second generation devices, such as Jarvik 2000 and MicroMed Debakey LVADs, are early in their development but show considerable promise that should be assessed through long-term studies. Evidence of the clinical effectiveness of LVADs as a BTR was limited to seven non-comparative observational studies that appeared to show that the LVADs were beneficial in providing support until myocardial recovery. It was not possible to assess whether the LVADs are more effective than other alternatives or specific devices. No evidence was found on the quality of life or functional status of patients and limited information on adverse events was reported. Six studies assessed the clinical effectiveness of LVADs as an LTCS and from these it was evident that LVADs provided benefits in terms of improved survival, functional status and quality of life. Nineteen studies assessed the costs and cost-effectiveness of LVADS for people with ESHF, with the majority being simple costing studies and very few studies of the cost-effectiveness of LVADs. With no relevant cost-effectiveness studies available, an economic evaluation for BTT and LTCS was developed. The economic evaluation has shown that neither LVAD indication considered, that is, BTT and LTCS, is a cost-effective use. For the HeartMate LVAD used as a BTT the cost per QALY was pound 65,242. In the less restrictive indication, LTCS, where LVADs are not just given to patients awaiting transplantation, the analysis has shown that LTCS is not cost-effective. The baseline cost per QALY of the first-generation HeartMate LVAD was pound 170,616. One- and multi-way sensitivity analysis had limited effect on the cost per QALY. A hypothetical scenario based on the cost of a second-generation MicroMed DeBakey device illustrated that a 60% improvement in survival over first-generation devices was necessary before the incremental cost-effectiveness approached pound 40,000 per QALY. CONCLUSIONS: Although the review showed that LVADs are clinically effective as a BTT with ESHF, the economic evaluation indicated that they are not cost-effective. With the limited and declining availability of donor hearts for transplantation, it appears that the future of the technology is in its use as an LTCS. Further research is needed to examine the clinical effectiveness of LVADs for people with ESHF, assessing patient survival, functional ability, quality of life and adverse events. Evaluations of the clinical effectiveness of LVADs should include economic evaluations, as well as data on quality of life, utilities, resources and costs. A systematic review of the epidemiology of ESHF should be undertaken to assess its potential impact.

Cost-Benefit Analysis↗

Physical environmental stimuli that turn healthcare facilities into healing environments through psychologically mediated effects: systematic review.

AIM: This paper reports a systematic review to determine the effects of physical environmental stimuli in healthcare settings on the health and well-being of patients. BACKGROUND: The concept of healing environments suggests that the physical environment of the healthcare setting can encourage the healing process and patients' feelings of well-being. Understanding the effects of physical environmental stimuli will allow us to design healthcare environments that generate these potential health benefits. METHOD: A search was conducted using the MedLine, PsychInfo, Embase, CINAHL, Iconda, ScienceDirect, Compendex and the ISI Citation Indexes databases. Studies were included if they concerned interventions involving health effects of environmental stimuli in healthcare settings on patients, and were based on controlled clinical trials published in peer-reviewed journals. Both clinical and psychological outcome measures were included. The search was completed in 2005. FINDINGS: Of the over 500 potentially relevant studies identified, only 30 met all criteria and were included in this review. Predominantly positive effects were found for sunlight, windows, odour and seating arrangements. Inconsistent effects were found for sound, nature, spatial layout, television and multiple stimuli interventions. In general, both the size and direction of effects seem highly dependent on characteristics of patient populations and healthcare settings. CONCLUSIONS: Studies that manipulate several environmental stimuli simultaneously clearly support the general notion that the physical healthcare environment affects the well-being of patients. However, when scrutinizing the effects of specific environmental stimuli, conclusive evidence is still very limited and difficult to generalize. The field thus appears to be in urgent need of well-conducted, controlled clinical trials. At present, and on the basis of the available research, it would be premature to formulate evidence-based guidelines for designing healthcare environments.

Environment Design↗

Exercise interventions for cancer patients: systematic review of controlled trials.

OBJECTIVE: To systematically review controlled trials investigating the effects of exercise interventions in cancer patients. METHODS: Studies were located through searching seven electronic databases (Medline, Embase, Cochrane Library, CancerLit, PsycInfo, Cinahl, SportDiscus), scanning reference lists of relevant articles, contacting experts (n = 20), and checking the contents lists of journals available through ZETOC (Electronic Table of Contents). To be included, trials had to be prospective, controlled, involve participants diagnosed with cancer and test an exercise intervention. Types of outcome were not restricted. Two reviewers independently applied the selection criteria. RESULTS: Thirty-three controlled trials (including 25 randomized trials) were included in the review. There was some evidence that physical function was increased among those who exercised. Furthermore, symptoms of fatigue did not appear to be increased and there were few adverse effects reported. There was insufficient evidence to determine effects on other outcomes, such as quality of life, with results hampered by the heterogeneity between studies as well as poor methodological quality. Data were also lacking on the long term effects of exercise relating to cancer recurrence or survival. CONCLUSIONS: There is preliminary evidence that exercise interventions for cancer patients can lead to moderate increases in physical function and are not associated with increased symptoms of fatigue. However, it is impossible from current evidence to determine whether exercise has long term beneficial effects on survival or quality of life.

Controlled Clinical Trials as Topic↗

The craniofacial morphology of the parents of children with orofacial clefting: a systematic review of cephalometric studies.

OBJECTIVE: To systematically review the cephalometric studies investigating the craniofacial morphology of the parents of children with orofacial clefting (OFC). SEARCH STRATEGY: The search strategy was based on the keywords 'parent', cephalometry', and 'cleft', identifying 17 studies, of which 15 'case/control' studies met the inclusion criteria Statistically significant clinically relevant cephalometric variables from univariate statistical tests and multivariate results were collated and presented unweighted. RESULTS/CONCLUSIONS: The parental craniofacial complex in OFC is distinctive in comparison to the non-cleft population. However, there is insufficient consistency in study designs and results to accurately characterize the parents of children with OFC. Although the craniofacial morphology of the parents of children with CL(P) differs to the parents of children with CP, there is insufficient information to accurately localize these differences.

Adult↗

Nonlatex vs. latex male condoms for contraception: a systematic review of randomized controlled trials.

This systematic review sought to evaluate nonlatex male condoms in comparison with latex condoms in terms of contraceptive efficacy, breakage, slippage, safety and user preferences. We searched computerized databases and contacted manufactures and investigators to find randomized controlled trials of nonlatex vs. latex male condoms. Two reviewers independently abstracted data from the 10 identified trials. While the eZ. on condom did not protect against pregnancy as well as its latex comparison condom, no differences were found in typical-use efficacy between the Avanti and the Standard Tactylon and their latex counterparts. Nonlatex condoms were associated with higher rates of clinical breakage than their latex comparisons, with statistically significant odds ratios of clinical breakage ranging from 2.6 (95% confidence interval [CI]: 1.6-4.3) to 5.0 (95% CI: 3.6-6.8). Few adverse events were reported. Substantial proportions of participants reported preferences for the nonlatex condoms. Despite higher rates of clinical breakage, nonlatex condoms still provide an acceptable alternative for those with allergies, sensitivities or preferences that might prevent the consistent use of latex condoms. The contraceptive efficacy of nonlatex condoms requires more research.

Condoms↗

Indices for continuity of care: a systematic review of the literature.

This article systematically reviews published literature on different continuity of care (COC) indices that assess the physician-patient relationship and the applicability of such indices to pediatric and chronic-disease patient populations. Frequency and visit type may vary for pediatric and chronically ill patients versus healthy adult patients. Two investigators independently examined 5,070 candidate articles and identified 246 articles related to COC. Forty-four articles were identified that include 32 different indices used to measure COC. Indices were classified into those that calculated COC primarily based on duration of provider relationship (n=2), density of visits (n=17), dispersion of providers (n=8), sequence of providers (n=1), or subjective estimates (n=4). The diversity of COC indices reflect differences in how this measure is conceptualized. No index takes into account the visit type. A unique index that reflects continuity in the physician patient relationship for pediatric and chronic disease populations is needed.

Benchmarking↗

Hot versus cold tonsillectomy: a systematic review of the literature.

OBJECTIVE: We systematically reviewed the literature comparing monopolar electrocautery versus cold knife dissection tonsillectomy. METHODS: The MEDLINE database was searched using the key words "tonsillectomy," "hot," "cold," "sharp," "bleeding," and "cautery." Selection criteria included prospective trials comparing electrodissection versus cold knife dissection on posttonsillectomy pain and hemorrhage. Six of the 815 articles met the selection criteria. RESULTS: Pooled data for the paired studies showed significantly more patients with pain worse on the electrodissection side (148 of 293 = 51%) than the cold knife side (33 of 293 [11%]; P = 0.001) on postoperative days 4 to 10. There were significantly more analgesic doses after surgery with electrodissection (means 26.7 versus 19.2; P = 0.028) and higher pain scores for adults undergoing electrodissection (means, 2.6 versus 0.8; significance could not be determined). There were no differences in hemorrhage rates. CONCLUSIONS: Electrodissection increases pain in comparison to sharp dissection for tonsillectomy. Postoperative hemorrhage rates are not significantly different when comparing the 2 methods.

Adolescent↗

Frequency and risk factors of subclinical cardiotoxicity after anthracycline therapy in children: a systematic review.

BACKGROUND: The aim of this systematic review was to summarise and appraise the published evidence with regard to the frequency and risk factors of subclinical cardiotoxicity in apparently healthy survivors of childhood cancer after anthracycline therapy. PATIENTS AND METHODS: A search was made in Medline for studies published between 1966 and May 2001 that included >50 children and reported on the frequency of measures of subclinical cardiotoxicity. Information about the studies was abstracted by two reviewers and a validity score was calculated for each study. RESULTS: The reported frequency of subclinical cardiotoxicity varied between 0% and 57% in the 25 studies included. Differences in outcome definitions of subclinical cardiotoxicity and differences in study patients with respect to the dose of anthracycline seemed to explain part of the wide variance of the frequency of subclinical cardiotoxicity. Fourteen of the 25 studies showed serious methodological limitations. CONCLUSIONS: The reported frequency of subclinical cardiotoxicity shows a wide variation. Well designed studies with accurate and precise outcome measurements in well described groups of patients, after a sufficiently long follow-up period, are needed to obtain more insight into the frequency and importance of risk factors, and the clinical consequences of anthracycline-related subclinical cardiotoxicity.

Antibiotics, Antineoplastic↗

The treatment effects of Invisalign orthodontic aligners: a systematic review.

BACKGROUND: The authors conducted a systematic review of the literature to determine the treatment effects of the Invisalign orthodontic system (Align Technology), Santa Clara, Calif.). TYPES OF STUDIES REVIEWED: The authors reviewed clinical trials that assessed Invisalign's treatment effects in nongrowing patients. They did not consider trials involving surgical or other simultaneous fixed or removable orthodontic treatment interventions. RESULTS: The authors searched electronic databases (PubMed, MEDLINE, MEDLINE In-Process & Other Non-Indexed Citations, Evidence Based Medicine Reviews, EMBASE Excerpta Medica, Thomsen's ISI Web of Science and LILACS) with the help of a senior health sciences librarian. They used "Invisalign" as the sole search term, and 22 documents appeared in the combined search. Thereafter, they used "clinical trials," "humans" and "Invisalign treatment effects" as abstract selection criteria. Only two published articles met these inclusion criteria, though after reading the actual articles, the authors determined that they did not adequately evaluate Invisalign treatment effects. Both articles identified methodological issues. CLINICAL IMPLICATIONS: The inadequately designed studies the authors found represented only a lower level of evidence (level II). Therefore, the authors found that no strong conclusions could be made regarding the treatment effects of Invisalign appliances. Future prospective randomized clinical trials are required to support, with sound scientific evidence, the claims about Invisalign's treatment effects. Clinicians will have to rely on their Invisalign clinical experience, the opinions of experts and the limited published evidence when using Invisalign appliances.

Activator Appliances↗

Healthy living interventions and schizophrenia: a systematic review.

AIM: This paper reports a systematic review of the published and grey literature which has investigated the efficacy of healthy living interventions for adults with a diagnosis of schizophrenia or schizo-affective disorder. BACKGROUND: Adults with a diagnosis of schizophrenia or schizo-affective disorder have reduced life expectancy when compared with members of the general population, with approximately 59% of excess mortality resulting from natural causes. METHODS: The review was conducted following guidelines provided by the United Kingdom National Health Service Centre for Reviews and Dissemination, and using the Medline, PsycINFO, CINAHL, Embase, Cochrane Library, National Research Register, and System for Info on Grey Literature databases. RESULTS: Sixteen studies were identified, examining four types of healthy living interventions: smoking cessation (n = 7), weight management (n = 5), exercise (n = 3) and nutritional education (n = 1). The smoking cessation, weight management and exercise studies showed positive outcomes in the main. The quality of the studies, however, was generally poor. Only two had control groups, most recruited small self-selected samples, six did not standardize for diagnosis, external validity was generally poor and no studies followed participants for longer than 6 months. The best quality evidence was produced by the smoking cessation and weight management studies, which were more methodologically robust and demonstrated promising outcomes. CONCLUSIONS: Further research is needed to assist the development of effective interventions to help this client group to adopt and maintain healthier lifestyles. Research and practice development in this area may be an important role for nurses in both hospital and community settings.

Health Promotion↗

True molar intrusion attained during orthodontic treatment: a systematic review.

INTRODUCTION: The aim of this systematic review was to quantify the amount of true molar intrusion attainable during orthodontic treatment. METHODS: A literature search was conducted to identify clinical trials that assessed true molar intrusion through superimposition of lateral cephalogram tracings. Craniofacial growth had to be factored out when appropriate. Electronic databases (Pubmed, Medline, Medline In-Process & Other Non-Indexed Citations, all EBM reviews, Embase, Web of Science, and Lilacs) were searched with the help of a senior health-sciences librarian. Abstracts that appeared to fulfill the initial selection criteria were selected, and the full-text original articles were then retrieved and analyzed. Only articles that fulfilled the final selection criteria were finally considered. Their references were also hand-searched for possible missing articles from the database searches. RESULTS: Thirty abstracts met the initial inclusion criteria, and these articles were retrieved. From these, 29 were later rejected because they did not either quantify true molar intrusion or factor out normal craniofacial growth when required. Only 1 article remained, and it showed a mean maxillary molar intrusion of 0.96 mm (SD, 0.54) in 12 subjects. CONCLUSIONS: True molar intrusion appears to be achievable in the maxillary arch, although the amount of evidence is minimal. The clinical significance of the magnitude of the true intrusion reported is questionable as the sole treatment option to correct open-bite malocclusions. Better quantification method of the true intrusion attained has to be utilized.

Clinical Trials as Topic↗

Sensitivity and specificity of immunohistochemical antibodies used to distinguish between benign and malignant pleural disease: a systematic review of published reports.

AIMS: A systematic review of published reports that have evaluated the ability of immunohistochemistry and argyrophil nucleolar organizing region (AgNOR) staining to distinguish between benign and malignant pleural disease. METHODS: Nineteen relevant papers published during the period 1979-2005 were identified. Individual results of immunohistochemistry for five diagnostic antibodies were extracted to calculate diagnostic sensitivity and specificity. results from five of these studies that had evaluated proliferation markers or AgNOR staining techniques were also summarized. RESULTS: Most antibodies demonstrated poor to moderate diagnostic ability. Desmin and epithelial membrane antigen (EMA) were the most useful, with sensitivity and specificity both above 74%. The combination of EMA and AgNOR was reported as having 95% diagnostic sensitivity. A high MCM2 labelling index also differentiated between benign and malignant pleural disease. CONCLUSIONS: Immunohistochemistry is of limited value, but newer diagnostic methods may be useful additions in this area of pathology. The diagnostic importance of histological features seen on plain tissue sections is emphasized as vital for correctly differentiating between benign pleural disease and malignant pleural mesothelioma.

Antigens, Neoplasm↗

Constraint-induced movement therapy following stroke: a systematic review of randomised controlled trials.

This systematic review investigated the effects on function, quality of life, health care costs, and patient/carer satisfaction of constraint-induced movement therapy (CIMT) for upper limb hemiparesis following stroke. A comprehensive search of the complete holdings of MEDLINE, CINAHL, EMBASE, Cochrane Library, PEDro and OTseeker to March 2005 was conducted. Fourteen eligible randomised controlled trials were identified and relevant data extracted by two independent reviewers. Effect sizes were calculated and results were pooled where possible. Method quality of the trials, assessed using the PEDro scale, had a mean score of five (range three to seven). Thirteen trials compared CIMT to an alternative treatment and/or a control group. One trial compared two CIMT protocols. Acute, subacute, and chronic conditions were studied. Effect sizes could be estimated for nine trials. Results were significant and in favour of CIMT in eight of these for at least one measure of upper limb function. The pooled standardised mean difference could be calculated for five outcome measures producing moderate to large effect sizes, only one of which attained statistical significance. Results indicate that CIMT may improve upper limb function following stroke for some patients when compared to alternative or no treatment. Rigorous evaluation of constraint-induced movement therapy using well-designed and adequately powered trials is required to evaluate the efficacy of different protocols on different stroke populations and to assess impact on quality of life, cost and patient/carer satisfaction.

Activities of Daily Living↗

Posttransplantation diabetes: a systematic review of the literature.

OBJECTIVES: To systematically review the incidence of posttransplantation diabetes (PTD), risk factors for its development, prognostic implications, and optimal management. RESEARCH DESIGN AND METHODS: We searched databases (MEDLINE, EMBASE, the Cochrane Library, and others) from inception to September 2000, reviewed bibliographies in reports retrieved, contacted transplantation experts, and reviewed specialty journals. Two reviewers independently determined report inclusion (original studies, in all languages, of PTD in adults with no history of diabetes before transplantation), assessed study methods, and extracted data using a standardized form. Meta-regression was used to explain between-study differences in incidence. RESULTS: Nineteen studies with 3,611 patients were included. The 12-month cumulative incidence of PTD is lower (<10% in most studies) than it was 3 decades ago. The type of immunosuppression explained 74% of the variability in incidence (P = 0.0004). Risk factors were patient age, nonwhite ethnicity, glucocorticoid treatment for rejection, and immunosuppression with high-dose cyclosporine and tacrolimus. PTD was associated with decreased graft and patient survival in earlier studies; later studies showed improved outcomes. Randomized trials of treatment regimens have not been conducted. CONCLUSIONS: Physicians should consider modification of immunosuppressive regimens to decrease the risk of PTD in high-risk transplant recipients. Randomized trials are needed to evaluate the use of oral glucose-lowering agents in transplant recipients, paying particular attention to interactions with immunosuppressive drugs.

Databases, Bibliographic↗