@misc{indiciae742aaef472f7,
  title = {Gastrointestinal endoscopy (1)},
  author = {J F Morrissey and M Reichelderfer},
  year = {1991},
  doi = {10.1056/nejm199110173251606},
  url = {https://pubmed.ncbi.nlm.nih.gov/1891023/},
  note = {Source identifier: 1891023}
}