@inbook{1139227053, author={Alexandros N. Karavas and Niloo M. Edwards}, editor={Halter, Jeffrey B. and Ouslander, Joseph G. and Studenski, Stephanie and High, Kevin P. and Asthana, Sanjay and Supiano, Mark A. and Ritchie, Christine}, title={Valvular Heart Disease}, booktitle={Hazzard's Geriatric Medicine and Gerontology, 7e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accessmedicine.mhmedical.com/content.aspx?aid=1139227053} }