1. Department of Radiation Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
2. Department of Otolaryngology-Head & Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
3. Department of Stomatology, Shanghai Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China