1. Department of Oral and Maxillofacial Surgery, College & Hospital of Stomatology, Guangxi Medical University, Nanning, P.R. China.
2. Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Nanning, P.R. China.
3. Guangxi Clinical Research Center for Craniofacial Deformity, Nanning, P.R. China.
4. Guangxi Key Laboratory of Oral and Maxillofacial Surgery Disease Treatment, Nanning, P.R. China.