@misc{indiciae8c15d8372d04,
  title = {Activity after myocardial infarction.},
  author = {H J Bethell},
  year = {1984},
  doi = {10.1136/bmj.288.6418.720},
  url = {https://pubmed.ncbi.nlm.nih.gov/6421446/},
  note = {Source identifier: 6421446}
}