@misc{indiciae2ba015c2dd5f,
  title = {Letter: Exercise testing in CAD.},
  author = {R H Bilbro},
  year = {1974},
  doi = {10.1161/01.cir.49.6.1267},
  url = {https://pubmed.ncbi.nlm.nih.gov/4831669/},
  note = {Source identifier: 4831669}
}