1. Department of Otolaryngology–Head and Neck Surgery, Chang Gung Memorial Hospital, Keelung, Taiwan
2. College of Medicine, Chang Gung University, Taoyuan, Taiwan
3. Department of Otolaryngology–Head and Neck Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
4. Department of Otolaryngology–Head and Neck Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan