@misc{indiciae82180893666a,
  title = {Monitoring operative risk in the elderly.},
  author = {L R Del Guercio and J D Cohn},
  year = {1980},
  doi = {10.1001/jama.243.13.1350},
  url = {https://pubmed.ncbi.nlm.nih.gov/7359697/},
  note = {Source identifier: 7359697}
}