1. Izmir Katip Celebi University Faculty of Medicine, Department of Internal Medicine, Division of Rheumatology, Izmir, Turkey
2. Hacettepe University Faculty of Medicine, Department of Internal Medicine, Division of Rheumatology, Ankara, Turkey
3. Uludağ University Faculty of Medicine, Department of Internal Medicine, Division of Rheumatology, Bursa, Turkey
4. Trakya University Faculty of Medicine, Department of Internal Medicine, Division of Rheumatology, Edirne, Turkey
5. MSD Turkey, Istanbul, Turkey