1. College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar
2. Private Practice, Doha, Qatar
3. Division of Orthodontics and Dentofacial Orthopedics, American University of Beirut Medical Center, Beirut, Lebanon
4. Department of Orthodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
5. Department of Orthodontics, University of Pennsylvania, Philadelphia, PA, USA