1. Department of Oral and Maxillofacial Plastic and Traumatic Surgery, Beijing Stomatological Hospital of Capital Medical University, Beijing, People's Republic of China.
2. Division of Growth and Development, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA.
3. Arcadia High School, Arcadia, California, USA.
4. Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
5. Division of Plastic and Reconstructive Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA.
6. Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA.