@misc{indiciae3ed492d21c7f,
  title = {Sample selection bias in clinical research.},
  author = {W M Swenson},
  year = {1980},
  doi = {10.1016/s0033-3182(80)73680-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/7384392/},
  note = {Source identifier: 7384392}
}