@misc{indiciae590a1a021967,
  title = {Complications, comorbidities, and mortality: improving classification and prediction.},
  author = {L L Roos and L Stranc and R C James and J Li},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9180617/},
  note = {Source identifier: 9180617}
}