@misc{indiciae57d26de088a5,
  title = {The first mitral valve replacement.},
  author = {A F Norman},
  year = {1991},
  doi = {10.1016/0003-4975(91)90892-t},
  url = {https://pubmed.ncbi.nlm.nih.gov/1998448/},
  note = {Source identifier: 1998448}
}