1. Department of Rheumatology Mohammed Kassab National Institute of Orthopedics Mannouba Tunisia
2. Faculty of Medicine of Tunis University Tunis El Manar Tunis Tunisia
3. Research Unit UR17SP04 2010, Ksar Said Tunis 2010 Tunisia
4. Department of Pediatric Orthopedics Mohammed Kassab National Institute of Orthopedics Mannouba Tunisia