@inbook{1198113000,
author={Michael H. Crawford},
editor={Crawford, Michael H.},
title={Aortic Regurgitation},
booktitle={Current Diagnosis & Treatment: Cardiology, 6e},
publisher={McGraw Hill Education},
address={New York, NY},
year={2023},
url={accessmedicine.mhmedical.com/content.aspx?aid=1198113000}
}