1 Liver Unit, Vall d'Hebron Hospital Universitari, Barcelona, Spain.
2 Liver Unit, Vall d'Hebron Institut de Recerca, Barcelona, Spain.
3 Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain.
4 Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Madrid, Spain.
5 Center for Liver Diseases, Pittsburgh Liver Research Center, Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.