1. Department of Pediatrics, Center for Liver, Digestive, and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands;
2. Netherlands Consortium for Systems Biology, Amsterdam, The Netherlands
3. Nutrition, Metabolism and Genomics Group, Wageningen University, Wageningen, The Netherlands; and
4. Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands;