@misc{indiciae9b1728c57072,
  title = {Electrocardiography.},
  author = {A D John and Lee Fleisher},
  year = {2004},
  doi = {10.1097/00004311-200404210-00003},
  url = {https://pubmed.ncbi.nlm.nih.gov/14716194/},
  note = {Source identifier: 14716194}
}