1. School of Medicine, National Yang-Ming University; Taipei Taiwan
2. School of Speech Language Pathology & Audiology, Chung-Shan Medical University; Taichung Taiwan
3. Department of Otolaryngology-Head & Neck Surgery; Taichung Veterans General Hospital; Taichung Taiwan
4. Department of Neurology; Taichung Veterans General Hospital; Taichung Taiwan
5. Department of Sensory Organs; ENT Section, Sapienza University of Rome; Rome Italy
6. School of Medicine, Chung-Shan Medical University; Taichung Taiwan