1. National Institute of Dementia, Seongnam, South Korea
2. Department of Psychiatry, Seoul National University Bundang Hospital, Seongnam, South Korea
3. Department of Psychiatry, University of Ulsan College of Medicine Asan Medical Center, Seoul, South Korea
4. Department of Neurology, Korea University, School of Medicine, Korea University Anam Hospital, Seoul, South Korea
5. Department of Psychiatry, Hallym University, College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
6. Department of Neurology, The Catholic University of Korea, College of Medicine, Seoul St. Mary’s Hospital, Seoul, South Korea
7. Department of Psychiatry, Ajou University School of Medicine, Ajou University Medical Center, Suwon, South Korea
8. Department of Neurology, Konkuk University College of Medicine, Konkuk University Medical Center, Seoul, South Korea