@misc{indiciae9c6266b1f4ae,
  title = {Reflections on controlled trial.},
  author = {A B Hill},
  year = {1966},
  doi = {10.1136/ard.25.2.107},
  url = {https://pubmed.ncbi.nlm.nih.gov/5326437/},
  note = {Source identifier: 5326437}
}