Vera-Portilla AF, Minaya Ruiz MJ, Vera Portilla WA, Huanca Báez J, Pardo Apaza P. Intestinal obstruction due to gallstone ileus: a case report. Acta Med Peru [Internet]. 2022Sep.20 [cited 2024May5];39(3). Available from: http://www.amp.cmp.org.pe/index.php/AMP/article/view/2383