The original version of this article unfortunately contained a mistake. In the author list, the name of author Zhiyi Zhou was incorrectly spelled. The correct spelling has been published in this Erratum.
Footnotes
The online version of the original article can be found under doi:10.1186/s13000-015-0356-3.
Contributor Information
Zhiyi Zhou, Email: zzywin2006@aliyun.com.
Jiaming Xie, Email: wuxicaiying2015@163.com.
Ying Cai, Email: xiejiaming2015@163.com.
Shudong Yang, Email: yangshudong2015@163.com.
Ying Chen, Email: wuxichenying2015@163.com.
HaoRong Wu, Email: wuhaorong666@126.com.