1. Department of Internal Medicine, Bakirkoy Dr. Sadi Konuk Education and Research Hospital, Istanbul, Turkey
2. Department of Internal Medicine, Istanbul Bilim University Medical Faculty, Florence Nightingale Hospital, Istanbul, Turkey
3. Department of Internal Medicine, Izmir Bozyaka Education and Research Hospital, Izmir, Turkey
4. Department of Endocrinology and Metabolism, Sisli Hamidiye Etfal Education and Research Hospital, Istanbul, Turkey