@misc{indiciae994eacb397d2,
  title = {Changes in oxygenation and pulse rate during endoscopy.},
  author = {S R Hayward and C Sugawa and R F Wilson},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2919846/},
  note = {Source identifier: 2919846}
}