@misc{indiciaefe5660a6bcdc,
  title = {Risk stratification for open heart surgery.},
  author = {A Allan and A T Forsyth},
  year = {1992},
  doi = {10.1136/bmj.305.6867.1500-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/1493413/},
  note = {Source identifier: 1493413}
}