@inbook{1118235218,
author={Yvonne Badillo Vázquez},
editor={Torres, Eduardo Pérez  and Francis, Juan Miguel Abdo and Sahagún, Fernando Bernal and Stalnikowitz, David Kershenobich},
title={Estreñimiento},
booktitle={Gastroenterología},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2015},
url={accessmedicina.mhmedical.com/content.aspx?aid=1118235218}
}