@misc{indiciaeb4a37b643eab,
  title = {Valid selection of subjects in case-control studies.},
  author = {J J Schlesselman},
  year = {1985},
  doi = {10.1016/0021-9681(85)90040-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4008596/},
  note = {Source identifier: 4008596}
}