@misc{indiciae566efaabd39a,
  title = {Systematic reviews. Some examples.},
  author = {P Knipschild},
  year = {1994},
  doi = {10.1136/bmj.309.6956.719},
  url = {https://pubmed.ncbi.nlm.nih.gov/7950526/},
  note = {Source identifier: 7950526}
}