@misc{indiciaee71bcd3a2425,
  title = {Cardiorespiratory changes during upper gastrointestinal endoscopy.},
  author = {W C Edmondson and R J Eltringham and M W Gear},
  year = {1991},
  doi = {10.1111/j.1365-2044.1991.tb09947.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1781553/},
  note = {Source identifier: 1781553}
}