@misc{indiciaeda1afe6935a1,
  title = {Preoperative pulmonary evaluation.},
  author = {G W Smetana},
  year = {1999},
  doi = {10.1056/nejm199903253401207},
  url = {https://pubmed.ncbi.nlm.nih.gov/10089188/},
  note = {Source identifier: 10089188}
}