1. First Department of Internal Medicine; National and Kapodestrian University of Athens; School of Medicine; ‘Laiko’ General Hospital; Athens Greece
2. Department of Clinical Chemistry; School of Medicine; University of Crete; Heraklion Crete Greece
3. Division of Endocrinology, Diabetes and Metabolism; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston MA USA
4. Second Department of Pediatrics & Diabetes Center; P & A Kyriakou Children's Hospital; Athens Greece
5. Endocrine Department; E. Venizelou Hospital; Athens Greece
6. Department of Hygiene, Epidemiology and Medical Statistics; National and Kapodistrian University of Athens Medical School; Athens Greece