Funding for this research was provided by:
Japan Society for the Promotion of Science (#22570029)
Text and Data Mining valid from 2018-10-27
Received: 23 January 2018
Accepted: 21 September 2018
First Online: 27 October 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.