About the Authors

Takeshi Inoue

Affiliation Department of pediatrics, center for child development and psychosomatic, Dokkyo medical university Koshigaya hospital, Koshigaya, Saitama, Japan

Yuiko Sakuta

Affiliation Faculty of Human Life Sciences, Jissen Women’s University, Hino, Tokyo, Japan

Keiichi Shimamura

Affiliation Department of pediatrics, center for child development and psychosomatic, Dokkyo medical university Koshigaya hospital, Koshigaya, Saitama, Japan

Hiroko Ichikawa

Affiliation Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba, Japan

Megumi Kobayashi

Affiliation Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi, Japan

Ryoko Otani

Affiliation Department of pediatrics, center for child development and psychosomatic, Dokkyo medical university Koshigaya hospital, Koshigaya, Saitama, Japan

Masami K. Yamaguchi

Affiliation Department of Psychology, Chuo University, Hachioji, Tokyo, Japan

So Kanazawa

Affiliation Department of Psychology, Japan Women's University, Kawasaki, Kanagawa, Japan

Ryusuke Kakigi

Affiliation Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi, Japan

Ryoichi Sakuta

sakuta@dokkyomed.ac.jp

Affiliation Department of pediatrics, center for child development and psychosomatic, Dokkyo medical university Koshigaya hospital, Koshigaya, Saitama, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TI YS KS HI MK RO MKY SK RK RS. Performed the experiments: TI YS KS HI MK RO MKY SK. Analyzed the data: TI YS KS HI MK MKY SK. Contributed reagents/materials/analysis tools: MKY SK RK RS. Wrote the paper: TI YS RO MKY SK RK RS. Making the test-stimuli: TI MKY SK RK RS. Collection of participants: TI KS RO RS. Collection of clinical characteristics: TI RO. Reviewing manuscript: TI YS KS HI MK RO MKY SK RK RS.