1. Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
2. Division of Rheumatology, Department of Pediatrics, Erciyes University Faculty of Medicine, Kayseri, Turkey
3. Division of Rheumatology, Department of Pediatrics, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
4. Division of Rheumatology, Department of Pediatrics, Umraniye Training and Research Center, University of Health Sciences, Istanbul, Turkey
5. Division of Hematology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey