@misc{indiciae8d065f97484c,
  title = {Closed mitral valvotomy.},
  author = {K Fraser and M A Turner and B A Sugden},
  year = {1976},
  doi = {10.1136/bmj.2.6031.352},
  url = {https://pubmed.ncbi.nlm.nih.gov/947420/},
  note = {Source identifier: 947420}
}