@misc{indiciaee79bfe7ba3ee,
  title = {Overtubes (sleeves) for upper gastrointestinal endoscopy.},
  author = {P B Cotton},
  year = {1983},
  doi = {10.1136/gut.24.9.863},
  url = {https://pubmed.ncbi.nlm.nih.gov/6884820/},
  note = {Source identifier: 6884820}
}