@misc{indiciaea96ae4c2c6fe,
  title = {Does nasal oxygen reduce the cardiorespiratory problems experienced by elderly patients undergoing endoscopic retrograde cholangiopancreatography?},
  author = {D J Haines and D Bibbey and J R Green},
  year = {1992},
  doi = {10.1136/gut.33.7.973},
  url = {https://pubmed.ncbi.nlm.nih.gov/1644341/},
  note = {Source identifier: 1644341}
}