1. Department of Gastroenterology and Hepatology; Odense University Hospital; Odense Denmark
2. Department of Gastroenterology and Hepatology; Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBERehd); Institute of Health Carlos III; University Hospital Ramón y Cajal; University of Alcalá; IRYCIS; Madrid Spain
3. Department for Visceral Surgery and Medicine; University Hospital Bern; Bern Switzerland
4. Gastro unit; Copenhagen University Hospital Hvidovre; Hvidovre Denmark