1. DONALD Study Center, Department of Nutritional Epidemiology, Institute of Nutrition and Food Science, University of Bonn, 44225 Dortmund, Germany
2. Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
3. German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany
4. Department of Endocrinology and Diabetology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
5. Research Department of Child Nutrition, St. Josef-Hospital, University Hospital of Pediatrics and Adolescent Medicine, Ruhr-University Bochum, 44791 Bochum, Germany
6. Pediatric Clinic Dortmund, 44137 Dortmund, Germany
7. Department of Medicine, Division of Nephrology, University of California San Francisco, San Francisco, CA 94143, USA
8. Pediatric Endocrinology and Diabetology, Center of Child and Adolescent Medicine, Justus Liebig University, 35392 Giessen, Germany