Shi, Zhiwen
Hong, Xiaoping
Bechtel, Hans A.
Zeng, Bo
Martin, Michael C. http://orcid.org/0000-0002-6611-070X
Watanabe, Kenji http://orcid.org/0000-0003-3701-8119
Taniguchi, Takashi
Shen, Yuen-Ron
Wang, Feng
Article History
Received: 11 March 2015
Accepted: 15 June 2015
First Online: 20 July 2015
Competing interests
: The authors declare no competing financial interests.