@misc{indiciae3a6f107f5697,
  title = {Wide variations in surgical mortality.},
  author = {N Mortensen},
  year = {1989},
  doi = {10.1136/bmj.298.6670.344},
  url = {https://pubmed.ncbi.nlm.nih.gov/2493929/},
  note = {Source identifier: 2493929}
}