@misc{indiciae65f0c621809f,
  title = {Chronotropic incompetence in exercise testing.},
  author = {C F Chin and J C Messenger and P S Greenberg and M H Ellestad},
  year = {1979},
  doi = {10.1002/clc.4960020103},
  url = {https://pubmed.ncbi.nlm.nih.gov/498601/},
  note = {Source identifier: 498601}
}