1 Gastroenterology Department, Hospital del Salvador, Santiago, Chile.
2 GI/Liver Unit Hospital Clinic, Barcelona, Spain; Institut d'Investigacions Biomediques August Pi I Sunyer (IDIBAPS) y Centro de Investigaciones en Red Hepaticas y Digestivas (CIBERehd), Spain; Faculty of Medicine, University of Barcelona, Villarroel 170, Esc 3-2, Barcelona 08036, Spain. Electronic address: acardena@clinic.cat.