1. From the Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital and Chang Gung University, Taipei, Taiwan.
2. Departments of Head & Neck Oncology (II), Chang Gung Memorial Hospital and Chang Gung University, Taipei, Taiwan.
3. Chang Gung Cancer Center, and Graduate Institute of Clinical Medical Sciences, Chang Gung Memorial Hospital and Chang Gung University, Taipei, Taiwan.
4. Department of Diagnostic Radiology, Chang Gung Memorial Hospital and Chang Gung University, Taipei, Taiwan.