Hu, J.
Liu, X.
Yue, C. L.
Liu, J. Y.
Zhu, H. W.
He, J. B.
Wei, J.
Mao, Z. Q.
Antipina, L. Yu.
Popov, Z. I.
Sorokin, P. B.
Liu, T. J.
Adams, P. W.
Radmanesh, S. M. A.
Spinu, L.
Ji, H.
Natelson, D.
Article History
Received: 20 October 2014
Accepted: 31 March 2015
First Online: 4 May 2015
Competing interests
: The authors declare no competing financial interests.