1. Department of Oral and Maxillofacial Surgery; The Second Xiangya Hospital, Central South University; Changsha People's Republic of China
2. State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University; Chengdu People's Republic of China
3. Department of Oral and Maxillofacial Surgery; West China Hospital of Stomatology, Sichuan University; Chengdu People's Republic of China