1. Department of Gastroenterology, Hospital Germans Trias i Pujol, Badalona, Spain
2. Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
3. Department of Pathology, Hospital Germans Trias i Pujol, Badalona, Spain
4. Centro de Investigaciones Biomédicas em Red de Enfermedades hepáticas y digestivas [CIBEREHD], Madrid, Spain
5. Department of Gastroenterology, Hospital Bellvitge [L’Hospitalet], Spain
6. Department of Pathology, Hospital Bellvitge [L’Hospitalet], Spain
7. Department of Gastroenterology, Hospital Santa Creu i Sant Pau, Barcelona, Spain
8. Department of Pathology, Hospital Santa Creu i Sant Pau, Barcelona, Spain