1. School of Medicine; National Yang-Ming University; Taipei Taiwan
2. Department of Speech Language Pathology and Audiology; Chung Shan Medical University; Taichung Taiwan
3. Department of Otolaryngology-Head and Neck Surgery; Taichung Veterans General Hospital; Taichung Taiwan
4. Division of Gastroenterology; Taichung Veterans General Hospital; Taichung Taiwan
5. College of Medicine; Chung Shan Medical University; Taichung Taiwan