1. Department of Psychiatry & Center of Sleep Disorders, National Taiwan University Hospital, Taipei, Taiwan;
2. Division of Cardiology, Department of Internal Medicine & Community Medicine Center, National Yang-Ming University Hospital, Yilan, Taiwan;
3. Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan;
4. Community Medicine Research Center & Institute of Public Health, National Yang-Ming University, Taipei, Taiwan