1. Second Medical Department; Aristotle University Thessaloniki; Thessaloniki Greece
2. Research Institute and Diabetes Center, Second Department of Internal Medicine; National and Kapodistrian University of Athens; Athens Greece
3. Department of Endocrinology and Metabolic Diseases; University of Thessaly; Larisa Greece
4. First Medical Department; G. Papanikolaou General Hospital; Thessaloniki Greece
5. Division of Endocrinology-Diabetes, First Department of Internal Medicine; Aristotle University Thessaloniki; Thessaloniki Greece
6. Analysi Iatriki S.A.; Thessaloniki Greece
7. First Department of Propedeutic and Internal Medicine; National and Kapodistrian University of Athens; Athens Greece
8. Harris Manchester College; University of Oxford; Oxford UK