Li, Runrun
Zhou, Jing
Chen, Wen
Sun, Huajun
Bao, Yiwang
Zhang, Qi
Funding for this research was provided by:
the National Natural Science Foundation of China (51572205, 51072148, 51102191, 51472227)
the Fundamental Research Funds for the Central Universities of Ministry of Education of China (2012-II-016)