1. Department of Public Health; Ghent University; Ghent Belgium
2. Faculty of Medicine and Pharmacy; Vrije Universiteit Brussel; Brussels Belgium
3. Department of Movement and Sports Sciences; Ghent University; Ghent Belgium
4. Department of Nutrition and Dietetics; Harokopio University; Athens Greece
5. Clinic of Paediatric Endocrinology; Medical University of Varna; Varna Bulgaria
6. Public Health Division; The Children's Memorial Health Institute; Warsaw Poland
7. GENUD (Growth, Exercise, Nutrition and Development) Research Group; University of Zaragoza; Zaragoza Spain
8. Division of Metabolic and Nutritional Medicine Dr. von Hauner Children's Hospital Ludwig-Maximilians-University of Munich; München Germany