@misc{indiciae99f564ba4046,
  title = {Letter: Maximal exercise testing in variant angina.},
  author = {J de Swiet},
  year = {1976},
  doi = {10.1136/hrt.38.6.655},
  url = {https://pubmed.ncbi.nlm.nih.gov/1275993/},
  note = {Source identifier: 1275993}
}