1. Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
2. Department of Otolaryngology-Head and Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
3. Department of Otolaryngology-Head and Neck Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan
4. Research Center of Sleep Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
5. Department of Health Services Policy and Management, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
6. Department of Otorhinolaryngology, Taipei City Hospital, Taipei, Taiwan
7. Department of Speech, Language and Audiology, National Taipei University of Nursing and Health, Taipei, Taiwan
8. School of Health Care Administration, College of Management, Taipei Medical University, Taipei, Taiwan
9. Sleep Research Center, Taipei Medical University Hospital, Taipei, Taiwan