1. Division of Cardiology, Department of Internal Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
2. Department of Cardiology, Korea University Anam Hospital, Seoul, Korea
3. Department of Psychiatry, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
4. Clinical Preventive Medicine Center, Seoul National University Bundang Hospital, Seongnam, Korea
5. Department of Otorhinolaryngology, Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
6. Department of Neurology, Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
7. Department of Division of Cardiology, Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
8. Department of Psychiatry and Sleep Medicine Center, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea