Hu, Yong-Jie
Li, Jing
Darling, Kristopher A.
Wang, William Y.
VanLeeuwen, Brian K.
Liu, Xuan L.
Kecskes, Laszlo J.
Dickey, Elizabeth C.
Liu, Zi-Kui
Article History
Received: 23 December 2014
Accepted: 28 May 2015
First Online: 2 July 2015
Competing interests
: The authors declare no competing financial interests.