@misc{indiciaed8c52c386330,
  title = {The case-control study and retrospective controls.},
  author = {J I Mann and M P Vessey},
  year = {1979},
  doi = {10.1136/bmj.2.6203.1507-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/526828/},
  note = {Source identifier: 526828}
}