1. 1Gastroenterology Department, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), University of Barcelona, Barcelona, Spain.
2. 2Bellvitge Biomedical Research Institute (IDIBELL), Catalan Institute of Oncology, Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) and University of Barcelona, Barcelona, Spain.
3. 3Pathology Department, Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain.
4. 4Biochemistry and Molecular Genetics Department, Hospital Clínic of Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.
5. 5Department of Preventive Medicine and Epidemiology, Clinical Institute of Internal Medicine and Dermatology, Hospital Clinic of Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona,Barcelona, Spain.
6. 6Gastroenterology Department, Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain.
7. 7Unitat de Prevenció i Registre del Càncer, Servei d'Epidemiologia i Avaluació, Hospital del Mar, Barcelona, Spain.
8. 8Department of Clinical Sciences, University of Barcelona and Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain.