@inbook{1152353133, author={Jacob A. David and John Paul Kelada}, editor={David, Jacob A.}, title={Gastroenterology}, booktitle={CURRENT Practice Guidelines in Inpatient Medicine 2018–2019}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2018}, url={accessmedicine.mhmedical.com/content.aspx?aid=1152353133} }