1. Department of Neuropsychiatry; Seoul National University Bundang Hospital; Seongnam
2. Department of Psychiatry; Dongguk University Gyeongju Hospital; Gyeongju
3. Department of Psychiatry; Gyeongsang National University School of Medicine; Jinju
4. Department of Neuropsychiatry; Soonchunhyang University Bucheon Hospital; Bucheon
5. Department of Psychiatry, School of Medicine; Chungnam National University; Daejeon
6. Department of Psychiatry; Yonsei University Wonju Severance Christian Hospital; Wonju
7. Department of Psychiatry, School of Medicine; Konkuk University, Konkuk University Medical Center; Seoul
8. Department of Psychiatry, School of Medicine; Konkuk University, Konkuk University Chungju Hospital; Chungju
9. Department of Neuropsychiatry; Jeju National University Hospital; Jeju
10. Department of Psychiatry; Gyeongsang National University Hospital; Jinju
11. Department of Neuropsychiatry; Kyunggi Provincial Hospital for the Elderly; Yongin
12. Department of Neuropsychiatry; Seoul National University Hospital; Seoul
13. Department of Psychiatry; Seoul National University, College of Medicine; Seoul
14. Department of Neuropsychiatry; Inje University Sanggye Paik Hospital; Seoul
15. Department of Psychiatry; Dankook University Hospital; Cheonan
16. Department of Psychiatry; Kangwon National University, School of Medicine; Chuncheon
17. Department of Brain and Cognitive Sciences; Seoul National University, College of Natural Sciences; Seoul
18. National Institute of Dementia; Seongnam Korea.