About the Authors

Michihiro Sugahara

msuga@spring8.or.jp

Affiliation RIKEN SPring-8 Center, Sayo, Hyogo, Japan

Michiyo Takehira

Affiliation RIKEN SPring-8 Center, Sayo, Hyogo, Japan

Katsuhide Yutani

Affiliation RIKEN SPring-8 Center, Sayo, Hyogo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Revisions of final manuscript: KY. Conceived and designed the experiments: MS KY. Performed the experiments: MS MT. Analyzed the data: MS KY. Wrote the paper: MS.