[1] Istanbul Univ, Istanbul Fac Med, Dept Internal Med, Div Endocrinol & Metab, Istanbul, Turkey
[2] Nursing Univ Hlth Sci Turkey, Hamidiye Fac Nursing, Dept Internal Med, Istanbul, Turkey
[3] Istanbul Univ, Cerrahpasa Fac Hlth Sci, Dept Hlth Management, Istanbul, Turkey
[4] Istanbul Univ, Istanbul Fac Med, Dept Publ Hlth, Div Med Sci, Istanbul, Turkey
[5] Istanbul Univ, Istanbul Fac Med, Dept Internal Med, Div Endocrinol & Metab, TR-34093 Istanbul, Turkey