@misc{indiciaefc976e7c1235,
  title = {12-Lead electrocardiogram.},
  author = {P Rees},
  year = {1968},
  doi = {10.1136/bmj.1.5594.768-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/5641463/},
  note = {Source identifier: 5641463}
}