@misc{indiciae2185bc8cf01d,
  title = {The exercise test in perspective.},
  author = {L T Sheffield and T J Reeves and H Blackburn and M H Ellestad and V F Froelicher and D Roitman and S Kansal},
  year = {1977},
  doi = {10.1161/01.cir.55.5.681},
  url = {https://pubmed.ncbi.nlm.nih.gov/849627/},
  note = {Source identifier: 849627}
}