@misc{indiciae2c069b800fb6,
  title = {The development of the pacemaker.},
  author = {J A Hopps},
  year = {1981},
  doi = {10.1111/j.1540-8159.1981.tb03682.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6171784/},
  note = {Source identifier: 6171784}
}