Shimada, Takahiro
Lich, Le Van
Nagano, Koyo
Wang, Jian-Shan
Wang, Jie
Kitamura, Takayuki
Article History
Received: 14 July 2016
Accepted: 27 September 2016
First Online: 7 October 2016
Competing interests
: The authors declare no competing financial interests.