@inbook{1144153412, author={Paul Stelzer and Robin Varghese}, editor={Cohn, Lawrence H. and Adams, David H.}, title={Stentless Aortic Valve and Root Replacement}, booktitle={Cardiac Surgery in the Adult, 5e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accesscardiology.mhmedical.com/content.aspx?aid=1144153412} }