Document is current
Any future updates will be listed below
-
Authors
Zhao, Lei
Zhou, Muke
Wang, Bin
Guo, Jian
Chen, Ning
He, Li
- License Information
-
More Information
Article History
Received: 28 February 2015
Accepted: 8 July 2015
First Online: 24 July 2015
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: This study was approved by the Research Ethics Committee of Units.
