Bian, Huakang
Xu, Xiandong
Li, Yunping
Koizumi, Yuichiro
Wang, Zhongchang
Chen, Mingwei
Yamanaka, Kenta
Chiba, Akihiko
Article History
Received: 2 April 2015
Revised: 22 June 2015
Accepted: 24 June 2015
First Online: 28 August 2015
Competing interests
: The authors declare no conflict of interest.