@inbook{1118234048, author={Eduardo Pérez Torres and Juan Miguel Abdo Francis and Fernando Bernal Sahagún and David Kershenobich Stalnikowitz}, title={}, booktitle={Gastroenterología}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={accessmedicina.mhmedical.com/content.aspx?aid=1118234048} }