Funding for this research was provided by:
Grant-in-Aid for Scientific Research (C) from the Japan Society for the Promotion of Science (23580106)
Text and Data Mining valid from 2019-04-01
Received: 19 November 2018
Revised: 5 March 2019
Accepted: 19 March 2019
First Online: 1 April 2019
Compliance with ethical standards
: The authors declare that they have no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors.