1. Department of Internal Medicine; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
2. Top Institute Food and Nutrition; Wageningen The Netherlands
3. Department of Laboratory Medicine; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
4. DSM Nutritional Products; Kaiseraugst Switzerland
5. Division of Human Nutrition; Wageningen University; Wageningen The Netherlands
6. Department of Pathology; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
7. SphingoTec GmbH; Hohen Neuendorf Germany
8. Transplant Lines Food and Nutrition Biobank and Cohort Study; University Medical Center Groningen; University of Groningen; Groningen The Netherlands