@misc{indiciaed4e9624ad6a7,
  title = {Arrhythmias during upper gastrointestinal endoscopy.},
  author = {P K Mathew and F V Ona and K Damevski and W A Wallace},
  year = {1979},
  doi = {10.1177/000331977903001207},
  url = {https://pubmed.ncbi.nlm.nih.gov/533013/},
  note = {Source identifier: 533013}
}