@misc{indiciaeff1687fde46b,
  title = {Confounding confounding.},
  author = {D A Grayson},
  year = {1987},
  doi = {10.1093/oxfordjournals.aje.a114687},
  url = {https://pubmed.ncbi.nlm.nih.gov/3618585/},
  note = {Source identifier: 3618585}
}