1Department of Nutrition and Dietetics,Harokopio University,70 El Venizelou Avenue,17671Kallithea,Athens,Greece. 2Department of Movement and Sport Sciences,Ghent University,Ghent,Belgium. 3National Institute for Health and Welfare,Helsinki,Finland. 4Department of Public Health,Ghent University,Ghent,Belgium. 5Instituto Investigacion Sanitaria Aragon (IISA),CIBERCV,Zaragoza,Spain. 6International Diabetes Federation European Region,Brussels,Belgium. 7Department of Pediatrics,Medical University Varna,Varna,Bulgaria. 8Extensive Life Oy,Helsinki,Finland. 9Growth, Exercise, Nutrition and Development Research Group, University of Zaragoza, Zaragoza, Spain; School of Health Science (EUCS), University of Zaragoza,Zaragoza,Spain. 10Department of Family and Occupational Medicine,University of Debrecen,Debrecen,Hungary. 11Department for Prevention & Care of Diabetes, Medical Clinic Unit III, University Clinic Carl Gustav Carus at Technical University Dresden,Dresden,Germany. 12First Department of Propaedeutic Medicine, National and Kapodistrian University of Athens Medical School, Laiko General Hospital,Athens,Greece.