@misc{indiciae9f27355eaf45,
  title = {Risk stratification for open heart surgery.},
  author = {S A Nashef},
  year = {1993},
  doi = {10.1136/bmj.306.6874.394-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/8461701/},
  note = {Source identifier: 8461701}
}