Barcelona Hepatic Hemodynamic Laboratory, Liver Unit, Hospital Clínic, Centro de Investigación Biomédica en Red Enfermedades Hepáticas y Digestivas (CIBEREHD), European Reference Network on Hepatological Diseases (ERN RARE-LIVER), Institut de Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.