1 Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus and Universitat Autònoma de Barcelona, Barcelona, Spain.
2 Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain.
3 Center for Outcomes Research in Liver Disease, Washington, DC, USA.
4 Department of Medicine, Center for Liver Diseases, Inova Fairfax Hospital, Falls Church, VA, USA.
5 Betty and Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, VA, USA.