@misc{indiciaee4bb3a0e58ff,
  title = {Colonoscopy.},
  author = {J S Barthel and J B Marshall},
  year = {1992},
  doi = {10.1016/s0025-6196(12)61131-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/1434875/},
  note = {Source identifier: 1434875}
}