@misc{indiciae40b47aae731f,
  title = {Profound first-degree atrioventricular block. A 30-year study.},
  author = {H L Greene and P F Ryan and V A McKusick},
  year = {1978},
  doi = {10.1378/chest.74.2.212},
  url = {https://pubmed.ncbi.nlm.nih.gov/679755/},
  note = {Source identifier: 679755}
}