1. Department of Otolaryngology, Cheng Hsin General Hospital, Taipei, Taiwan, ROC
2. Faculty of Medicine, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan, ROC
3. Institute of Brain Science, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan, ROC