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;

Lack of almagate interference in breath test results for Helicobacter pylori diagnosis (Almatest study) Carles Pons; Modesto Varas; Javier P. Gisbert; Mercè Barenys; Francesca Pajuelo; Francisco Javier Fernández;