@inbook{56194868,
author={Kurt Pfeifer, MD and Gerald W. Smetana, MD, FACP},
editor={McKean, Sylvia C. and Ross, John J. and Dressler, Daniel D. and Brotman, Daniel J. and Ginsberg, Jeffrey S.},
title={Chapter 55. Preoperative Pulmonary Risk Assessment},
booktitle={Principles and Practice of Hospital Medicine},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2012},
url={accessmedicine.mhmedical.com/content.aspx?aid=56194868}
}