Department of Psychiatry, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; Department of Psychiatry, Hasanuddin University, Jl. Perintis Kemerdekaan Km. 10, Makassar 90245, South Sulawesi, Indonesia; Department of Biochemistry, Hasanuddin University, Jl. Perintis Kemerdekaan Km. 10, Makassar 90245, South Sulawesi, Indonesia.