Funding for this research was provided by:
Japan Society for the Promotion of Science (KAKENHI 11169202, 14380319, 25251009,)
Article History
Received: 16 November 2017
Accepted: 23 November 2017
First Online: 14 December 2017
Compliance with ethical standards
:
: Atsushi Nakagawa declares that he has no conflicts of interest. Naoyuki Miyazaki declares that he has no conflicts of interest. Akifumi Higashiura declares that he has no conflicts of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.