Shi, Zhiwen
Jin, Chenhao
Yang, Wei
Ju, Long
Horng, Jason
Lu, Xiaobo
Bechtel, Hans A.
Martin, Michael C.
Fu, Deyi
Wu, Junqiao
Watanabe, Kenji
Taniguchi, Takashi
Zhang, Yuanbo
Bai, Xuedong
Wang, Enge
Zhang, Guangyu
Wang, Feng
Article History
Received: 7 May 2014
Accepted: 23 July 2014
First Online: 31 August 2014
Competing interests
: The authors declare no competing financial interests.