@misc{indiciae4e5544ecd06d,
  title = {Upper-gastrointestinal endoscopy in perspective.},
  author = {R H Salter},
  year = {1975},
  doi = {10.1016/s0140-6736(75)90247-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/53341/},
  note = {Source identifier: 53341}
}