Authors
Yan Gu
Department of Orthodontics, Peking University School and Hospital of Stomatology, P.R. China
Urban Hagg
Orthodontics, Faculty of Dentistry, The University of Hong Kong, SAR and China and Institute of Odontolog, Faculty of Health Sciences, University of Copenhagen
John Wu
Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
Shadow Yeung
Research Laboratories, Faculty of Dentistry, The University of Hong Kong, China