1. Department of Otolaryngology; Taipei Hospital; Ministry of Health and Welfare; New Taipei City Taiwan
2. Institute of Epidemiology and Preventive Medicine; College of Public Health; National Taiwan University; Taipei Taiwan
3. Sleep Center; National Taiwan University Hospital; Taipei Taiwan
4. Department of Otolaryngology; National Taiwan University Hospital; Taipei Taiwan
5. College of Medicine; Fu Jen Catholic University; Taipei Taiwan
6. Department of Internal Medicine; Hsiao Chung-Cheng Hospital; New Taipei City Taiwan