1. Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
2. Center for Craniofacial Stem Cell Research and Regeneration, Peking University School and Hospital of Stomatology, Beijing, China
3. Center Laboratory, School and Hospital of Stomatology, Peking University, Beijing, China
4. Center for Temporomandibular Disorders and Orofacial Pain, Peking University School and Hospital of Stomatology, Beijing, China