@misc{indiciae7555def47f53,
  title = {Variant angina pectoris.},
  author = {M D Klein and R B Whiting and B Lown and M B Laver},
  year = {1970},
  doi = {10.1056/nejm197006252822618},
  url = {https://pubmed.ncbi.nlm.nih.gov/5419306/},
  note = {Source identifier: 5419306}
}