@misc{indiciae30f354ef9836,
  title = {Friendly control bias.},
  author = {J Siemiatycki},
  year = {1989},
  doi = {10.1016/0895-4356(89)90012-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2760659/},
  note = {Source identifier: 2760659}
}