@inbook{1180017166, author={Annsa Huang and Priya Kathpalia}, editor={Walter, Louise C. and Chang, Anna and Chen, Pei and Harper, G. Michael and Rivera, Josette and Conant, Rebecca and Lo, Daphne and Yukawa, Michi}, title={Gastrointestinal Diseases}, booktitle={Current Diagnosis & Treatment Geriatrics, 3e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2021}, url={accessmedicine.mhmedical.com/content.aspx?aid=1180017166} }