I Pigeot1,2, S de Henauw3, T Baranowski4. 1. Leibniz Institute for Prevention Research and Epidemiology - BIPS, Bremen, Germany. 2. Institute of Statistics, Faculty of Mathematics and Computer Science, University of Bremen, Bremen, Germany. 3. Faculty of Medicine and Health Sciences, Department of Public Health, Ghent University, Ghent, Belgium. 4. Department of Pediatrics, USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX, USA.