Wang, Xuetao
Jin, Baosheng
Xu, Bin
Lan, Weijuan
Qu, Chengrui
Funding for this research was provided by:
the National Natural Science Foundation of China (50806020)
Excellent Youth Foundation of Henan Scientific Committee (114100510010)
Science and Technology Foundation of Henan Province (082300460090)
Science and Technology Foundation of education department of Henan Province (2008A470003)