Bouveret's Syndrome: Acute Gastric Outlet Obstruction from Gallstones. (August 2016) - Ávila, Filipa; Rego, Ana Catarina; Santos, Vera Costa; Massinha, Paulo; Liberal, Rodrigo; Nunes, Nuno; Pereira, José Renato; Paz, Nuno; Duarte, Maria Antónia