@misc{indiciae5baa0cc489b9,
  title = {Technical problems with pacemakers.},
  author = {A Castellanos},
  year = {1971},
  doi = {10.1056/nejm197106172842421},
  url = {https://pubmed.ncbi.nlm.nih.gov/5576467/},
  note = {Source identifier: 5576467}
}