@misc{indiciae9590cd5bc34c,
  title = {Congenital heart block.},
  author = {M CAMPBELL and M G THORNE},
  year = {1956},
  doi = {10.1136/hrt.18.1.90},
  url = {https://pubmed.ncbi.nlm.nih.gov/13284190/},
  note = {Source identifier: 13284190}
}