1. Departments of Otolaryngology, Chung Shan Medical University Hospital, Taichung, Taiwan
2. Departments of School of Medicine, Chung Shan Medical University, Taichung, Taiwan
3. Departments of Anesthesiology, Chung Shan Medical University Hospital, Taichung, Taiwan
4. Department of Otolaryngology, Taichung Veterans General Hospital, Taichung, Taiwan
5. Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan