Seza Ozen1, Selcan Demir2, Ezgi Deniz Batu3. 1. Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; sezaozen@gmail.com. 2. Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine. 3. Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey.