@inbook{1139745336, author={Michael H. Crawford}, editor={Crawford, Michael H.}, title={Mitral Regurgitation}, booktitle={CURRENT Diagnosis & Treatment: Cardiology, 5e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accessmedicine.mhmedical.com/content.aspx?aid=1139745336} }