Guo, Yi
Duan, Wanru
Ma, Chao
Jiang, Changqing
Xie, Yikuan
Hao, Hongwei
Wang, Renzhi
Li, Luming
Funding for this research was provided by:
National Natural Science Foundation of China (51077083, 51061160501, 61001008, 60906050)
Tsinghua University Initiative Scientific Research Program and the national science and technology support program (2011BAI12B07)