Xie, Xiaoping
Tang, Fang
Yang, Zhao
Zhang, Yaoyi
Feng, Zihao
Yang, Yu
Wu, Xiujin
Zhang, Feifei
Zhu, Jie
Xu, Kai
Article History
Received: 24 November 2014
Accepted: 27 February 2015
First Online: 20 March 2015
Competing interests
: F.T., Y.Z., Z.F., Y.Y., X.W., F.Z. and K.X. are employees of Chengdu Nuoen Biotechnologies, Inc.; all others declared none. The funding sources had no roles in study design, data collection and analyses, preparation and publication of this manuscript.