@misc{indiciae4c5ad824ee1d,
  title = {Open heart operations in the elderly: changing risk parameters.},
  author = {R Pifarré},
  year = {1993},
  doi = {10.1016/0003-4975(93)91138-d},
  url = {https://pubmed.ncbi.nlm.nih.gov/8239841/},
  note = {Source identifier: 8239841}
}