Funding for this research was provided by:
Japan Society for the Promotion of Science (Grants-in-Aid (Number: 15H03061) for Scientific Research (B))
Japan Science and Technology Agency (The Center of Innovation (COI) Program)
Text and Data Mining valid from 2017-01-21
Received: 20 August 2016
Accepted: 10 January 2017
First Online: 21 January 2017
Compliance with ethical standards
: This study was funded by the Center of Innovation (COI) Program from the Japan Science and Technology Agency (JST) and partly supported by Grants-in-Aid (no. 15H03061) for Scientific Research (B) from the Japan Society for the Promotion of Science.
: All authors declare that we have no conflict of interest about this study.
: All procedures performed in this study were in accordance with the ethical standards of the institutional ethics committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study prior to the experiments.