@misc{indiciae21b448435644,
  title = {Closed mitral valvulotomy.},
  author = {P Kärkölä and M I Kairaluoma and T K Larmi},
  year = {1976},
  url = {https://pubmed.ncbi.nlm.nih.gov/962276/},
  note = {Source identifier: 962276}
}