1. Gastrounit; Medical Division; Copenhagen University Hospital Hvidovre; Hvidovre Denmark
2. Department of Gastroenterology and Hepatology; Singapore General Hospital; Singapore
3. Gastroenterology and Liver Services; Concord Hospital; Sydney Australia
4. Department of Gastroenterology and Hepatology; University Medical Center Utrecht; The Netherlands
5. Public Health Unit; Epimad Registry; Lille University Hospital; Lille France
6. Inserm U954 and Department of Gastroenterology; University Hospital Nancy and Lorraine University; Vandoeuvre-lès-Nancy France