1. Department of Internal Medicine, Division of Rheumatology, Marmara University, School of Medicine, Istanbul, Turkey
2. Division of Rheumatology, Numune Education and Research Hospital, Ankara, Turkey
3. Department of Internal Medicine, Division of Rheumatology, Uludag University, School of Medicine, Bursa, Turkey
4. Vasculitis Research Centre, Hacettepe University, School of Medicine, Ankara, Turkey
5. School of Medicine, Department of Internal Medicine, Division of Rheumatology, Gazi University, Ankara, Turkey
6. Department of Public Health, Marmara University, School of Medicine, Istanbul, Turkey
7. Department of Internal Medicine, Marmara University, School of Medicine, Istanbul, Turkey