Gai, Zheng
Lin, Wenzhi
Burton, J. D.
Fuchigami, K.
Snijders, P. C.
Ward, T. Z.
Tsymbal, Evgeny Y.
Shen, J.
Jesse, Stephen
Kalinin, Sergei V.
Baddorf, Arthur P.
Article History
Received: 19 November 2013
Accepted: 26 June 2014
First Online: 24 July 2014
Competing interests
: The authors declare no competing financial interests.