@misc{indiciaef0c8be63a5c9,
  title = {Electrocardiography during upper gastrointestinal endoscopy.},
  author = {C J De Masi and K Akdamar},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/5798913/},
  note = {Source identifier: 5798913}
}