1. Department of Radiation Oncology, Linkou Chang Gung Memorial Hospital Medical Center, Taoyuan City, Taiwan
2. Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
3. Department of Radiation Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
4. Division of Medical Oncology, Department of Internal Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan City, Taiwan
5. Department of Otorhinolaryngology, Head, and Neck Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, Taiwan
6. Chang Gung University, Taoyuan City, Taiwan
7. School of Traditional Chinese Medicine, Chang Gung University, Taoyuan City, Taiwan