Trakya University, Medical Schooll, Division of Endocrinology and Metabolism, Edirne, Turkey
2.Istanbul University, Cerrahpaşa Medical Faculty, Department of Endocrinology and Metabolism, Istanbul, Turkey
3.Istanbul University, Cerrahpaşa Medical Faculty, Department of Biochemistry, Istanbul, Turkey
4.Department of Internal Medicine, Division of Endocrinology, Cerrahpaşa Medical Faculty, University of Istanbul, Cerrahpaşa, Turkey