@inbook{56212230,
author={Meghan Hayes, MD and Lucia Larson, MD},
editor={McKean, Sylvia C. and Ross, John J. and Dressler, Daniel D. and Brotman, Daniel J. and Ginsberg, Jeffrey S.},
title={Chapter 220. Overview of Physiologic Changes of Pregnancy},
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=56212230}
}