@misc{indiciae3023373cd4a2,
  title = {Defining and investigating difficult asthma: developing quality indicators.},
  author = {C O Prys-Picard and S M Campbell and J G Ayres and J F Miles and R M Niven and Consensus on Difficult Asthma Consortium UK (CODAC-UK)},
  year = {2005},
  doi = {10.1016/j.rmed.2005.10.013},
  url = {https://pubmed.ncbi.nlm.nih.gov/16303294/},
  note = {Source identifier: 16303294}
}