1. Department of Internal Medicine, Ankara Yildirim Beyazit University Medical Faculty, Bilkent City Hospital, Ankara, Turkey
2. Department of Endocrinology and Metabolism, Ankara Yildirim Beyazit University Medical Faculty, Bilkent City Hospital, Ankara, Turkey
3. Department of Nephrology, Bilkent City Hospital, Ankara, Turkey
4. Department of Biochemistry, Ankara Yildirim Beyazit University Medical Faculty, Bilkent City Hospital, Ankara, Turkey