@misc{indiciae89bc8004b3c1,
  title = {Letter: First and second versus second and third exercise tests.},
  author = {D H Spodick},
  year = {1975},
  doi = {10.1161/01.cir.51.2.394},
  url = {https://pubmed.ncbi.nlm.nih.gov/1078648/},
  note = {Source identifier: 1078648}
}