Zhang, Q
Ichimaru, N
Higuchi, S
Cai, S
Hou, J
Fujino, M
Nonomura, N
Kobayashi, M
Ando, H
Uno, A
Sakurai, K
Mochizuki, S
Adachi, Y
Ohno, N
Zou, H
Xu, J
Li, X-K
Takahara, S
Article History
Received: 10 June 2014
Revised: 6 November 2014
Accepted: 17 November 2014
First Online: 8 January 2015
Competing interests
: The authors declare no conflict of interest.