Sun, Xiu-Dong
Yu, Xin-Hui
Zhou, Shu-Mei
Liu, Shi-Qi
Funding for this research was provided by:
National Natural Science Foundation of China (31372084)
Chinese National Department Public Benefit Research Foundation (201303108)
Article History
Received: 26 April 2015
Accepted: 9 October 2015
First Online: 29 October 2015
Compliance with ethical standards
: We declare that we have no financial or personal relationships with other people or organizations that can inappropriately influence our work. There is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in our manuscript.
: This study was funded by the National Natural Science Foundation of China (31372084) and by the Chinese National Department Public Benefit Research Foundation (201303108).
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.