@misc{indiciae0bb1d172e2ec,
  title = {Familial sinus node disease.},
  author = {R D Spellberg},
  year = {1971},
  doi = {10.1378/chest.60.3.246},
  url = {https://pubmed.ncbi.nlm.nih.gov/5093256/},
  note = {Source identifier: 5093256}
}