Lu, Xiaofan
Li, Zhen
Li, Qunhui
Jiao, Yanmei
Ji, Yunxia
Zhang, Hongwei
Liu, Zhuoming
Li, Wei
Wu, Hao
Article History
Received: 20 January 2015
Revised: 1 June 2015
Accepted: 2 June 2015
First Online: 17 August 2015
Competing interests
: The authors have no funding or conflicts of interest to disclose.