@misc{indiciaecad380fe0a85,
  title = {Factors affecting mortality in biliary tract surgery.},
  author = {H A Pitt and J L Cameron and R G Postier and T R Gadacz},
  year = {1981},
  doi = {10.1016/0002-9610(81)90014-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/6970004/},
  note = {Source identifier: 6970004}
}