1. Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
2. School of Public Health, National Defense Medical Center, Taipei, Taiwan, Republic of China
3. Department of Medical Research, Tri-Service General Hospital, Taipei, Taiwan, Republic of China
4. Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China