1. Department of Psychiatry, Inje University College of Medicine and Haeundae Paik Hospital, Busan, Republic of Korea.
2. Department of Psychiatry, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
3. Department of Psychiatry, Inje University Sanggye Paik Hospital, Seoul, Republic of Korea.
4. Department of Psychiatry, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
5. Department of Cardiology, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
6. Department of Endocrinology, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
7. Department of Pulmonology and Allergy, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
8. Department of Psychiatry, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
9. Department of Psychiatry, Gachon University School of Medicine, Incheon, Republic of Korea.
10. Department of Psychiatry, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea.
11. National Institute of Dementia, Seongnam, Republic of Korea.
12. Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
13. Department of Psychiatry, Kyung Hee University School of Medicine, Seoul, Republic of Korea.