@misc{indiciae20b48f52bee7,
  title = {Gastrointestinal endoscopy.},
  author = {A J Smally and S K Pool},
  year = {1992},
  doi = {10.1056/nejm199204023261413},
  url = {https://pubmed.ncbi.nlm.nih.gov/1343808/},
  note = {Source identifier: 1343808}
}