Fujii, Takayuki
Schug, Joanna
Nishina, Kuniyuki
Takahashi, Taiki
Okada, Hiroyuki
Takagishi, Haruto
Article History
Received: 29 October 2015
Accepted: 14 November 2016
First Online: 8 December 2016
Competing interests
: The authors declare no competing financial interests.