About the Authors

Chihiro Morita

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Hirokazu Tsuji

Affiliation Yakult Central Institute, Tokyo, Japan

Tomokazu Hata

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Motoharu Gondo

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Shu Takakura

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Keisuke Kawai

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Kazufumi Yoshihara

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Kiyohito Ogata

Affiliation Yakult Central Institute, Tokyo, Japan

Koji Nomoto

Affiliation Yakult Central Institute, Tokyo, Japan

Kouji Miyazaki

Affiliation Yakult Central Institute, Tokyo, Japan

Nobuyuki Sudo

nobuyuki@med.kyushu-u.ac.jp

Affiliation Department of Psychosomatic Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CM NS. Performed the experiments: CM HT TH MG ST KK KO KN KM. Analyzed the data: CM HT KY NS. Contributed reagents/materials/analysis tools: HT KY KN KM. Wrote the paper: CM NS.