TY  - RPRT
TI  - Preoperative pulmonary evaluation.
AU  - J J Marx
AU  - N Punjabi
AU  - A Schwartz
PY  - 1999
DO  - 10.1056/nejm199908193410815
UR  - https://pubmed.ncbi.nlm.nih.gov/10475812/
ID  - 10475812
ER  -