@inbook{1164318297, author={Mary R. Kwaan and David B. Stewart Sr and Kelli Bullard Dunn}, editor={Brunicardi, F. Charles and Andersen, Dana K. and Billiar, Timothy R. and Dunn, David L. and Kao, Lillian S. and Hunter, John G. and Matthews, Jeffrey B. and Pollock, Raphael E.}, title={Colon, Rectum, and Anus}, booktitle={Schwartz's Principles of Surgery, 11e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={accessmedicine.mhmedical.com/content.aspx?aid=1164318297} }