1. Department of Otolaryngology; Guangzhou University of Traditional Chinese Medicine First Affiliated Hospital; Guangzhou 510405 Guangdong People's Republic of China
2. Key Laboratory of Oncology in Southern China; Sun Yat-sen University Cancer Center; Guangzhou 510060 Guangdong People's Republic of China
3. Department of Head and Neck Surgery; Sun Yat-sen University Cancer Center; Guangzhou 510060 Guangdong People's Republic of China