Funding for this research was provided by:
Japan Society for the Promotion of Science (16H06304, 26560122)
National Institute of Information and Communications Technology (178A03)
Received: 1 December 2016
Accepted: 8 May 2017
First Online: 24 July 2017
: Drs. Yamada, Shimada, Oi, and Ogata received research grants from JSPS for other research projects. Dr. Shimada received the research fund from Japan Science and Technology Agency (JST). The authors’ declare that they have no competing interests.
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