1. Department of Nutrition and Dietetics; Harokopio University of Athens; Athens Greece
2. First Department of Pediatrics; Athens University Medical School; ‘Aghia Sophia’ Children's Hospital; Athens Greece
3. Clinic of Social and Family Medicine; School of Medicine; University of Crete; Crete Greece
4. Department of Physical Education and Sport Science; Aristotle University of Thessaloniki; Thessaloniki Greece