[1] Seoul Natl Univ Hosp, Dept Neuropsychiat, Seoul 110744, South Korea
[2] Seoul Natl Univ Hosp, Clin Res Inst, Seoul 110744, South Korea
[3] Seoul Natl Univ, Interdisciplinary Program Cognit Sci, Seoul, South Korea
[4] Kyunggi Prov Hosp Elderly, Dept Neuropsychiat, Yongin, Kyunggi, South Korea
[5] Seoul Natl Univ, Bundang Hosp, Dept Neuropsychiat, Songnam, Kyunggi, South Korea
[6] Kangwon Natl Univ Hosp, Dept Psychiat, Chunchon, Kangwon, South Korea