1. State Key Laboratory of Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu Sichuan, Peoples Republic of China
2. Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu Sichuan, Peoples Republic of China
3. Department of Implant, The Affiliated Hospital of Qingdao University, Qingdao,Shandong, Peoples Republic of China
4. Department of Oral Pathology, West China Hospital of Stomatology (Sichuan University), Chengdu Sichuan, Peoples Republic of China