[1] Inje Univ, Dept Neuropsychiat, Sch Med, Paik Inje Mem Clin Res Inst, Pusan 614735, South Korea
[2] Chonnam Natl Univ, Sch Med, Dept Psychiat, Kwangju, South Korea
[3] Chonnam Natl Univ, Sch Med, Depress Clin Res Ctr, Kwangju, South Korea
[4] Chonnam Natl Univ, Sch Med, Dept Internal Med, Kwangju, South Korea