1. Department of Psychiatry and Behavioral Science and Institute of Human Behavioral Medicine; Seoul National University College of Medicine, Seoul National University Hospital; Seoul; Korea
2. Department of Neuropsychiatry; Eulji University School of Medicine, Eulji General Hospital; Seoul; Korea
3. Department of Psychiatry; Inha University College Medicine; Incheon; Korea
4. Department of Psychiatry; Yong-In Mental Hospital; Yong-In; Korea
5. Department of Psychiatry, Hallym Sacred Heart Hospital; Hallym University College of Medicine; Gyeonggi-do; Korea
6. Department of Psychiatry; Seoul Bukbu Geriatric Hospital 48; Seoul; Korea
7. Department of Psychiatry; Dongguk University College of Medicine, Dongguk University International Hospital; Gyeonggi-do; Korea
8. Department of Psychiatry, St. Mary's Hospital; The Catholic University; Seoul; Korea
9. Department of Psychiatry; Seoul National University Bundang Hospital; Gyeonggi-do; Korea