Funding for this research was provided by:
The Science Research Promotion Fund of the Japan Private School Promotion Foundation
Text and Data Mining valid from 2019-04-15
Received: 29 December 2018
Accepted: 8 April 2019
First Online: 15 April 2019
Compliance with ethical standards
: The authors declare that there are no conflicts of interest.
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.