1. Department of Nursing Research; University Medical Center Groningen; University of Groningen; the Netherlands
2. Department of Mathematics and Computer Science; Eindhoven University of Technology; the Netherlands
3. Department of Gastroenterology and Hepatology; Erasmus Medical Center; Rotterdam the Netherlands
4. Department of Gastroenterology and Hepatology; Leiden University Medical Center; the Netherlands
5. Department of Surgery; Section of Hepato-Pancreatic-Biliary Surgery and Liver Transplantation; University Medical Center Groningen; University of Groningen; the Netherlands
6. Department of Health Psychology; University Medical Center Groningen; University of Groningen; the Netherlands