1. Taiwan, Republic of China
2. Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taiwan, Republic of China
3. Head & Neck Oncology (II), Chang Gung Cancer Center, Chang Gung Memorial Hospital and Chang Gung University, Taiwan, Republic of China
4. Graduate Institute of Clinical Medical Sciences, Chang Gung Memorial Hospital and Chang Gung University, Taiwan, Republic of China
5. Department of Radiation Oncology, Chang Gung Memorial Hospital and Chang Gung University, Taiwan, Republic of China
6. Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taiwan, Republic of China