About the Authors

Nobuo Fukuda

Affiliation Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan

Motomichi Doi

Affiliation Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan

Shinya Honda

s.honda@aist.go.jp

Affiliation Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: NF. Performed the experiments: NF. Analyzed the data: NF MD SH. Wrote the paper: NF SH.