1. Department of Internal Medicine, Division of Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
2. Department of Internal Medicine, Division of Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
3. Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
4. Department of Pathology, Hacettepe University Faculty of Medicine, Ankara, Turkey
5. Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey