1. Syrian Board in Orthodontics, Specialist Orthodontist, Private Practice , Syria, Damascus
2. Department of Orthodontics, Stomatological Hospital of Chongqing Medical University , Chongqing , China
3. Faculty of Dentistry, Department of Orthodontics, First Affiliated Hospital of Zhengzhou University , Henan , China
4. CMH Institute of Dentistry Lahore, National University of Medical Sciences , Punjab , Pakistan