1. Pediatric Rheumatology Research Group, Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
2. Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
3. Department of Pediatrics, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Pediatrics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. Department of Pediatrics, Ardabil University of Medical Sciences, Ardabil, Iran
6. Division of Pediatric Rheumatology, Children’s Medical Center, No. 62 Dr. Gharib Sreet, Keshavarz Boulevard, Tehran 14194, Iran