@inbook{1118235058, author={Gretel Berenice Casillas Guzmán}, editor={Torres, Eduardo Pérez and Francis, Juan Miguel Abdo and Sahagún, Fernando Bernal and Stalnikowitz, David Kershenobich}, title={Dolor abdominal}, booktitle={Gastroenterología}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={accessmedicina.mhmedical.com/content.aspx?aid=1118235058} }