Affiliation: | 1. Clinical professor, Department of Orthodontics and Dentofacial Orthopedics, University of Pittsburgh School of Dental Medicine; private practice, Greensburg, Pa;2. Research fellow, Department of Orthodontics, Oral Health Centre, University of Western Australia, Perth;1. Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Wroclaw Medical University, Wroclaw, Poland;2. Department of Periodontology, Faculty of Dentistry, Wroclaw Medical University, Wroclaw, Poland;1. Faculty of Dentistry, Chang Gung Craniofacial Research Centre, Chang Gung Memorial Hospital at Taipei, Taiwan;2. Graduate Institute of Craniofacial and Dental Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan;3. Department of Plastic Surgery, Chang Gung Craniofacial Research Centre, Chang Gung Memorial Hospital at Taoyuan, Taiwan;1. Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia;2. Department of Orthodontics, Faculty of Dentistry, Cairo University, Cairo, Egypt |