@misc{indiciae8bbdfcf65f2d,
  title = {Preoperative pulmonary function evaluation for laparoscopic cholecystectomy.},
  author = {C M Wittgen and K S Naunheim and C H Andrus and D L Kaminski},
  year = {1993},
  doi = {10.1001/archsurg.1993.01420200054010},
  url = {https://pubmed.ncbi.nlm.nih.gov/8343060/},
  note = {Source identifier: 8343060}
}