Funding for this research was provided by:
Japan Science and Technology Agency (JPMJPR16D9)
Japan Society for the Promotion of Science (15H03029, 24103704)
Tateishi Science and Technology Foundation
Text and Data Mining valid from 2018-09-08
Received: 20 January 2018
Accepted: 1 September 2018
First Online: 8 September 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research 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.