About the Authors
- Shigeru Watanabe
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* E-mail: swat@flet.keio.ac.jp
Affiliation Department of Psychology, Keio University, Mita 2-15-45, Minato-Ku, Tokyo, Japan
Competing Interests
The author has declared no competing interests exist.
Author Contributions
Conceived and designed the experiments: SW. Performed the experiments: SW. Analyzed the data: SW. Contributed reagents/materials/analysis tools: SW. Wrote the paper: SW.