1. Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Instituto de Salud Carlos III; Barcelona Spain
2. Department of Cell Biology; Physiology and Immunology and Neurosciences Institute; Universitat Autònoma de Barcelona; Barcelona Spain
3. Digestive System Research Unit; University Hospital Vall d'Hebron; Department of Medicine; Universitat Autònoma de Barcelona; Barcelona Spain
4. Departments of Medical and Surgical Sciences, Digestive Diseases and Internal Medicine; C.R.B.A.; University of Bologna and St.Orsola-Malpighi Hospital; Bologna Italy