@misc{indiciae11e052c24826,
  title = {Second closed mitral valvotomy for recurrent mitral stenosis.},
  author = {K Fraser and B A Sugden},
  year = {1977},
  doi = {10.1136/thx.32.6.759},
  url = {https://pubmed.ncbi.nlm.nih.gov/601741/},
  note = {Source identifier: 601741}
}