1. Department of Otolaryngology, Liuzhou People’s Hospital of Guangxi, Liuzhou, Guangxi, China (mainland)
2. Department of Radiotherapy, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China (mainland)
3. Department of Radiotherapy, Guangxi Medical University Cancer Hospital, Nanning, Guangxi, China (mainland)
4. Department of Pathology, Liuzhou People’s Hospital, Liuzhou, Guangxi, China (mainland)