@misc{indiciae06938f15884c,
  title = {Missing hospital records: a confounding variable in retrospective studies.},
  author = {M Westgren and M Divon and J Greenspoon and R Paul},
  year = {1986},
  doi = {10.1016/0002-9378(86)90806-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/3740138/},
  note = {Source identifier: 3740138}
}