1. State Key Laboratory of Oral Diseases, West China Hospital of Stomatology Sichuan University Chengdu China
2. National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology Sichuan University Chengdu China
3. Department of Oral Maxillofacial Surgery, West China Hospital of Stomatology Sichuan University Chengdu China
4. Department of Biomedical Sciences School of Medicine and Health Sciences University of North Dakota Grand Forks North Dakota USA