1. Department of Otolaryngology–Head and Neck Surgery, Jinling Hospital, Nanjing Clinical Medical College, Second Military Medical University, Nanjing, Jiangsu, People's Republic of China.
2. Department of Oncology, Jinling Hospital, Nanjing, Jiangsu, People's Republic of China.
3. Department of Otolaryngology–Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China.