1. 1Harvard Medical School, Beth Israel Deaconess Medical Center, Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Boston, MA, USA
2. 2Department of Endocrinology and Diabetes, 251 Hellenic Air Force and VA General Hospital, Athens, Greece
3. 3"Hippokration" General Hospital of Thessaloniki, Department of Endocrinology, Thessaloniki, Greece
4. 4424 General Military Hospital, Department of Endocrinology, Ring Road, 564 29 N.Efkarpia, Thessaloniki, Greece ; ;