1 Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
2 Kyoto Institute of Nutrition & Pathology, Kyoto, Japan.
3 Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. Electronic address: sudo.nobuyuki.935@m.kyushu-u.ac.jp.