1. Department of Internal Medicine and Gastroenterology Zuyderland Medical Center Heerlen The Netherlands
2. Division of Gastroenterology and Hepatology Department of Internal Medicine Maastricht University Medical Center Maastricht The Netherlands
3. NUTRIM School for Nutrition, Toxicology and Metabolism Maastricht University Medical Center Maastricht The Netherlands
4. GROW School for Oncology and Developmental Biology Maastricht University Medical Center Maastricht The Netherlands
5. Department of Methodology and Statistics Maastricht University Medical Center Maastricht The Netherlands
6. CAPHRI School for Public Health and Primary Care Maastricht University Medical Center Maastricht The Netherlands