1 Department of Orthodontics, Affiliated Hospital of Stomatology, Medical College, Zhejiang University, Hangzhou, Zhejiang, PR China.
2 Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, CA, USA.
3 Department of Oral Implantology, Affiliated Hospital of Stomatology, Medical College, Zhejiang University, Hangzhou, Zhejiang, PR China.
4 Center of Stomatology, China-Japan Friendship Hospital, 2nd Yinghuayuan East Street, Chaoyang District, Beijing, PR China.
5 Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, Jilin, PR China.
6 Department of Cleft Lip and Palate Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, PR China.
7 Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, CA, USA. xzhang@dentistry.ucla.edu.
8 Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, UCLA and Orthopaedic Hospital, University of California, Los Angeles, CA, USA.
9 UCLA Division of Plastic and Reconstructive Surgery and Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, CA, USA.