@misc{indiciaef98507d5d0d4,
  title = {Gastrointestinal endoscopy.},
  author = {M V Sivak},
  year = {1997},
  doi = {10.1016/s0016-5107(97)70316-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9013184/},
  note = {Source identifier: 9013184}
}