@misc{indiciae7fefbda6d8fb,
  title = {A coding system for cardiac arrhythmias.},
  author = {L Schamroth and H D Friedberg},
  year = {1970},
  doi = {10.1016/s0022-0736(70)80010-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/4102821/},
  note = {Source identifier: 4102821}
}