1. Department of Internal Medicine, Division of Endocrinology and Metabolism, Faculty of Medicine, Istanbul University, Istanbul, Turkey
2. Department of Immunology, Koc University, Istanbul, Turkey
3. Department of Internal Medicine, Division of Geriatrics, School of Medicine, Marmara University, Istanbul, Turkey
4. Department of Internal Medicine, Goztepe Training and Research Hospital, Istanbul Medeniyet University, Istanbul, Turkey
5. Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey