Usefulness of endoscopic ultrasound in patients with minilithiasis and/or biliary sludge as a cause of symptoms of probable biliary origin after cholecystectomy Andrea Montenegro; Xavier Andújar; Fernando Fernández-Bañares; María Esteve; Carme Loras;

Timing of endoscopy in high-risk patients with acute upper gastrointestinal bleeding: Results of a multicenter international cohort study Javier Tejedor-Tejada; Benito Hermida; Cristina Camblor; Mohamed Emara; Salem Youssef Mohamed; Jose M. Perez-Pariente;

Exploring the utility of cellular indices in the diagnosis of ulcerative colitis Julio César Moreno Alfonso; Sharom Barbosa-Velásquez; Carlos Delgado-Miguel; Ada Molina Caballero; Sara Hernández-Martín; Alberto Pérez Martínez; María Concepción Yárnoz Irazábal;