1. School of Medicine, College of Medicine, Chang Gung University, Taoyuan 333323, Taiwan
2. Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, Keelung 204201, Taiwan
3. School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 333323, Taiwan
4. Department of Otolaryngology-Head and Neck Surgery and Communication Enhancement Center, Chang Gung Memorial Hospital, Taoyuan 333423, Taiwan