1. Shenshan Medical Center, Memorial Hospital of Sun Yat-Sen University, Shanwei, People’s Republic of China
2. Department of Otolaryngology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
3. Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People’s Republic of China
4. Department of Pathology and Laboratory Medicine, The Medical University of South Carolina, Charleston, SC, USA