@misc{indiciae40b0df92cbce,
  title = {Mitral valve surgery in the elderly.},
  author = {E M Lee and J N Porter and L M Shapiro and F C Wells},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9044072/},
  note = {Source identifier: 9044072}
}