@misc{indiciae052003ba4b72,
  title = {[Heart surgery].},
  author = {E K FREY},
  year = {1952},
  doi = {10.1055/s-0028-1115998},
  url = {https://pubmed.ncbi.nlm.nih.gov/12988780/},
  note = {Source identifier: 12988780}
}