1. Taipei, Taiwan, Republic of China
2. Department of Otolaryngology, China Medical University Hospital and Department of Medicine, China Medical University, Taichung, Taiwan
3. Department of Health, Republic of China, Taipei, Taiwan
4. Department of Otolaryngology, Min-Sheng General Hospital, Taoyuan, Taiwan
5. Department of Otolaryngology, Cathay General Hospital, Taipei, Taiwan.