Zhang, Yun
Yang, Yingyun
Bai, Yujia
Yang, Dan
Xiong, Yangyang
Zeng, Xuejun
Funding for this research was provided by:
National Nature Science Foundation of China (81402551)
Article History
Received: 11 August 2015
Revised: 28 December 2015
Accepted: 10 January 2016
First Online: 26 January 2016
Compliance with ethical standards
: All human studies have been approved by the appropriate ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All study participants provided their written informed consent prior to inclusion in the study.
: The authors declare no conflicts of interest. The authors confirm that they have full control of all primary data and that they agree to allow the journal to review their data if requested.