1 Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
2 Division of Oncology, Department of Pediatric Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan, China.
3 Department of Oromaxillofacial Head and Neck Oncology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.