1. Division of Rheumatology; Department of Internal Medicine; Faculty of Medicine; Namik Kemal University Hospital; Tekirdag Turkey
2. Department of Internal Medicine; Izmir Katip Çelebi University School of Medicine; Izmir Turkey
3. Department of Biochemistry; Adnan Menderes University School of Medicine; Aydin Turkey
4. Department of Internal Medicine and Division of Rheumatology; Izmir Katip Çelebi University School of Medicine; Izmir Turkey