1. Department of Otolaryngology-Head Neck Surgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, P.R. China 410008
2. Department of Otolaryngology-Head Neck Surgery, First Affiliated Hospital of Quanzhou, Fujian Medical University, 248 Dong Street, Quanzhou, Fujian, P.R. China 362000
3. Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322, United States