About the Authors

Na Chen

nanachen@fennel.rcast.u-tokyo.ac.jp

Affiliation Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan

Kanji Tanaka

Affiliation Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan

Katsumi Watanabe

Affiliation Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan

Competing Interests

KW is a member of PLOS ONE editorial board. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: NC KT KW. Performed the experiments: NC. Analyzed the data: NC KT. Contributed reagents/materials/analysis tools: NC KT KW. Wrote the paper: NC KT KW.