@misc{indiciae3d99cd0aafb8,
  title = {[AN AMERICAN SYSTEM FOR CODIFYING ELECTROCARDIOGRAMS].},
  author = {G BLOMQVIST and I ASTRAND},
  year = {1963},
  url = {https://pubmed.ncbi.nlm.nih.gov/14091727/},
  note = {Source identifier: 14091727}
}