@misc{indiciaef8fd672986fd,
  title = {[Current developments in gastrointestinal endoscopy. Part 1: The upper gastrointestinal tract].},
  author = {C Ell},
  year = {1993},
  url = {https://pubmed.ncbi.nlm.nih.gov/8307539/},
  note = {Source identifier: 8307539}
}