@misc{indiciaec74e411428c3,
  title = {Experiences with implanted cardiac pacemakers.},
  author = {L B McGuire and J R Beckwith and J B Littlefield and W H Muller},
  year = {1966},
  doi = {10.1016/0002-8703(66)90193-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/5902637/},
  note = {Source identifier: 5902637}
}