1. State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, China.
2. Xi'an Institute of Tissue Engineering and Regenerative Medicine, Xi'an, China.
3. Department of Orthodontics and School of Stomatology, The Fourth Military Medical University, Xi'an, China.
4. Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, China.