Yu, Aihong
Wang, Shufeng
Cheng, Xiaoguang
Liang, Wei
Bai, Rongjie
Xue, Yunhao
Li, Wenjun
Funding for this research was provided by:
National Natural Science Foundation of China (81271558)
Beijing Natural Science Foundation (7132061)
Grants from the Beijing Bureau of 215 program (2013-3-033, 2009-02-03)