Sui, Xueqin
Chen, Zhumin
Guo, Lei
Wu, Kai
Ma, Jun
Wang, Guanghui
Funding for this research was provided by:
National Natural Science Foundation of China (61272240)
National Natural Science Foundation of China (61103151)
Doctoral Fund of Ministry of Education of China (20110131110028)
Natural Science Foundation of Shandong Province (ZR2012FM037)
Excellent Middle-Aged and Youth Scientists of Shandong Province (BS2012DX017)