@misc{indiciae06dd823265cc,
  title = {Improvements in exercise electrocardiography.},
  author = {R A Bruce},
  year = {1989},
  doi = {10.1161/01.cir.79.2.458},
  url = {https://pubmed.ncbi.nlm.nih.gov/2914357/},
  note = {Source identifier: 2914357}
}