@misc{indiciae0cc4725cb86d,
  title = {Associations are not effects.},
  author = {D B Petitti},
  year = {1991},
  doi = {10.1093/oxfordjournals.aje.a115848},
  url = {https://pubmed.ncbi.nlm.nih.gov/1985440/},
  note = {Source identifier: 1985440}
}