@misc{indiciae5ebde09d2386,
  title = {Mitral valvotomy: closed or open?},
  author = {J Hayward},
  year = {1967},
  doi = {10.1111/j.1445-2197.1967.tb05535.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5229778/},
  note = {Source identifier: 5229778}
}