1. Postgraduate Course on the Science of Stress and Health Promotion; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
2. Division of Endocrinology, Metabolism and Diabetes; First Department of Pediatrics; ‘Aghia Sophia’ Children's Hospital; National and Kapodistrian University of Athens Medical School; Athens Greece
3. Division of Endocrinology and Metabolism; Clinical Research Center; Biomedical Research Foundation of the Academy of Athens; Athens Greece