@misc{indiciae12c4c8592f85,
  title = {Exercise ECG, its prognostic significance.},
  author = {I Astrand},
  year = {1973},
  doi = {10.1159/000393283},
  url = {https://pubmed.ncbi.nlm.nih.gov/4682276/},
  note = {Source identifier: 4682276}
}