@misc{indiciae5357ffb32fa3,
  title = {Progress in pacemaker longevity.},
  author = {D Friedberg and R C Lillehei},
  year = {1974},
  doi = {10.1016/s0022-0736(74)80017-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4811656/},
  note = {Source identifier: 4811656}
}