1. School of Medicine, Case Western Reserve University, Cleveland, OH, USA
2. Department of Otolaryngology, Hsinchu Cathay General Hospital, Hsinchu, Taiwan
3. Department of Otolaryngology, Cathay General Hospital, Taipei, Taiwan
4. School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
5. Department of Medical Research, Cathay General Hospital, Taipei, Taiwan
6. Department of Biochemistry, National Defense Medical Center, Taipei, Taiwan