@inbook{1139745058, author={Steven J. Lester and Amir E. Abbas}, editor={Crawford, Michael H.}, title={Aortic Stenosis}, booktitle={CURRENT Diagnosis & Treatment: Cardiology, 5e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accessmedicine.mhmedical.com/content.aspx?aid=1139745058} }