@misc{indiciae7136de2eaf3d,
  title = {Exercise as protection against heart attack.},
  author = {R S Paffenbarger and R T Hyde},
  year = {1980},
  doi = {10.1056/nejm198005013021810},
  url = {https://pubmed.ncbi.nlm.nih.gov/7366610/},
  note = {Source identifier: 7366610}
}