Funding for this research was provided by:
Japan Society for the Promotion of Science (15H04431)
Received: 21 June 2018
Accepted: 3 October 2018
First Online: 19 October 2018
Ethics approval and consent to participate
: The experimental design of this study was approved by the ethical committee of Faculty of Design, Kyushu University. All participants were instructed about this study and have written consent before the experiments.
: All participants have written consent for publication.
: The authors declare that they have no competing interests.
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