@misc{indiciae4e4293b3af29,
  title = {Nonexperimental data systems in surgery.},
  author = {L L Roos},
  year = {1989},
  doi = {10.1017/s0266462300007418},
  url = {https://pubmed.ncbi.nlm.nih.gov/10318325/},
  note = {Source identifier: 10318325}
}