Chang, Haixin
Saito, Mitsuhiro
Nagai, Takuro
Liang, Yunye
Kawazoe, Yoshiyuki
Wang, Zhongchang
Wu, Hongkai
Kimoto, Koji
Ikuhara, Yuichi
Article History
Received: 25 April 2014
Accepted: 25 July 2014
First Online: 12 August 2014
Competing interests
: The authors declare no competing financial interests.