@misc{indiciaed88f8b47907e,
  title = {Problems of exercise testing.},
  author = {J J Kellermann},
  year = {1971},
  doi = {10.1378/chest.59.2.124},
  url = {https://pubmed.ncbi.nlm.nih.gov/5100810/},
  note = {Source identifier: 5100810}
}