Funding for this research was provided by:
Japan Society for the Promotion of Science (15H04431)
Received: 14 December 2017
Accepted: 3 June 2018
First Online: 18 June 2018
Ethics approval and consent to participate
: The experimental design of this study was approved by the ethical committee of the Faculty of Design, Kyushu University. All participants were instructed about this study and provided written consent before the experiments.
: All participants presented written consent for publication.
: The authors declare that they have no competing interests.
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