@misc{indiciaed9e4d5842e6f,
  title = {Gastrointestinal endoscopy},
  author = {MK Sivak},
  year = {1999},
  doi = {10.1016/s0016-5107(99)70064-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/10202080/},
  note = {Source identifier: 10202080}
}