@misc{indiciae0d4c06aa7675,
  title = {Gastrointestinal endoscopy.},
  author = {J M Orr},
  year = {1993},
  doi = {10.5694/j.1326-5377.1993.tb121717.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/8450795/},
  note = {Source identifier: 8450795}
}