1. 2nd Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration Hospital, Thessaloniki, Greece
2. First Department of Pharmacology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. 2nd Department of Internal Medicine, Division of Gastroenterology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Endocrinology Division of the Police Outpatient-Clinic, Thessaloniki, Greece
5. Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, United States