@misc{indiciaeeb82fe369b46,
  title = {Randomised controlled trials: sampling.},
  author = {P C Elwood},
  year = {1982},
  doi = {10.1111/j.1365-2125.1982.tb01429.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/7082529/},
  note = {Source identifier: 7082529}
}