1. Division of Gastroenterology, Taichung Veterans General Hospital, Taichung, Taiwan
2. Department of Otolaryngology, Taichung Veterans General Hospital, Taichung, Taiwan
3. School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
4. School of Speech Language Pathology and Audiology, Chung Shan Medical University, Taichung, Taiwan
5. Department of Internal Medicine, Division of Gastroenterology, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
6. Department of Otolaryngology, Chung Shan Medical University Hospital, Taichung, Taiwan
7. School of Medicine, Chung Shan Medical University, Taichung, Taiwan
8. Department of Otolaryngology-Head and Neck Surgery, China Medical University Hospital, Taichung, Taiwan
9. Computer Aided Measurement and Diagnostic Systems Laboratory, Department of Industrial Engineering and Management, National Yunlin University of Science and Technology, Yunlin, Taiwan
10. Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
11. Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung, Taiwan