@misc{indiciaeb886b4181204,
  title = {Electrocardiogram in multiphasic health testing.},
  author = {C A Bertrand and I Pomper and G Hillman and J C Duffy and I Michell and K W Trout},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/270623/},
  note = {Source identifier: 270623}
}