1. Center of Sleep Medicine, Taipei Veterans General Hospital, Taipei, Taiwan;
2. Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan;
3. Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan;
4. Division of Nephrology, Department of Medicine, Taipei City Hospital Heping Fuyou Branch, Taipei, Taiwan;
5. Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan;
6. Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan;
7. Department of Radiology, Taipei City Hospital Heping Fuyou Branch, Taipei, Taiwan;
8. Institute of Emergency and Critical Care Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan;
9. Department of Family Medicine, Taipei Veterans General Hospital, Taipei, Taiwan;
10. Institute of Hospital and Health Care Administration, School of Medicine, National Yang-Ming University, Taipei, Taiwan