1 Department of Psychiatry, Yamagata University School of Medicine, 2-2-2 Iidanishi, Yamagata 990-9585, Japan. Electronic address: ryo.kobayashi@med.id.yamagata-u.ac.jp.
2 Department of Psychiatry, Yamagata University School of Medicine, 2-2-2 Iidanishi, Yamagata 990-9585, Japan.