About the Authors
- Takumi Yokosaka
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* E-mail: yokosaka.takumi@lab.ntt.co.jp
Affiliation NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Kanagawa, Japan
- Scinob Kuroki
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Affiliation NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Kanagawa, Japan
- Shin’ya Nishida
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Affiliation NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Kanagawa, Japan
- Junji Watanabe
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Affiliation NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Kanagawa, Japan
Competing Interests
This work was supported by Nippon Telegraph and Telephone (NTT) Corporation, the employer of all authors. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: TY SK SN JW. Performed the experiments: TY. Analyzed the data: TY. Wrote the paper: TY SK SN JW.