1. Department of Orthodontics, Faculty of Dental Medicine, Hacettepe University, Ankara, Turkey

2. Department of Orthodontics, Faculty of Dental Medicine, University of Belgrade, Belgrade, Serbia

3. Department of Orthodontics and Craniofacial Imaging Center, Faculty of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA

4. Department of Periodontics, Faculty of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA