1. Department of Gastroenterology and Hepatology; Leiden University Medical Center; Leiden The Netherlands
2. Liver Unit, Hospital Clínic, IDIBAPS, CIBEREHD; University of Barcelona; Barcelona Spain
3. Department of Gastroenterology and Hepatology; Erasmus Medical Center; Rotterdam The Netherlands
4. Department of Medical Statistics and Bio-Informatics; Leiden University Medical Center; Leiden The Netherlands
5. Department of Gastroenterology and Hepatology; University Medical Center Groningen; Groningen The Netherlands
6. Swiss Liver Centre, Inselspital; Bern University; Bern Switzerland