@misc{indiciaefc5631df2a7e,
  title = {Progress in pacemaker technology.},
  author = {G D Grren},
  year = {1974},
  doi = {10.1016/s0022-0736(74)80070-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4462702/},
  note = {Source identifier: 4462702}
}