@misc{indiciae56cb63013db6,
  title = {Second-order selection bias.},
  author = {S Redmond},
  year = {1994},
  doi = {10.1097/00043764-199410000-00002},
  url = {https://pubmed.ncbi.nlm.nih.gov/7830164/},
  note = {Source identifier: 7830164}
}