1. Affiliated Hospital of Weifang Medical University, Weifang Medical University, Weifang, Shandong 261035, P. R. China
2. School of Pharmacy, Weifang Medical University, Weifang, Shandong 261053, P. R. China
3. Shandong New Time Pharmaceutical Company, Ltd., Linyi, Shandong 276006, P. R. China
4. School of Basic Medicine, Weifang Medical University, Weifang, Shandong 261035, P. R. China