Zhang, Yanying
Ling, Juan
Yang, Qingsong
Wen, Chongqing
Yan, Qingyun
Sun, Hongyan
Van Nostrand, Joy D.
Shi, Zhou
Zhou, Jizhong
Dong, Junde
Article History
Received: 21 May 2015
Accepted: 12 October 2015
First Online: 5 November 2015
Competing interests
: The authors declare no competing financial interests.