Xu, Yuqun
Miyakawa, Takuya
Nakamura, Hidemitsu
Nakamura, Akira
Imamura, Yusaku
Asami, Tadao
Tanokura, Masaru
Article History
Received: 10 March 2016
Accepted: 20 July 2016
First Online: 10 August 2016
Competing interests
: The authors declare no competing financial interests.