1. Public Health and Epidemiology Research Group, School of Medicine and Health Sciences, Universidad de Alcalá, Madrid, Spain
2. Faculty of Health and Sports Sciences/Aragón Agri-Food Institute-IA2, University of Zaragoza, Huesca, Spain
3. General Sub-Directorate for International Action, Networks and International Organizations, Madrid City Hall, Madrid, Spain
4. Department of Childhood Education and Other Programs, Madrid City Hall, Madrid, Spain
5. GARUA, Non-Profit Cooperative, Madrid, Spain
6. Mensa Cívica, Non-Profit Association, Zaragoza, Spain
7. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA