1. Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730000, P.R. China.
2. School of Life Science, Lanzhou University, Lanzhou, Gansu 730000, P.R. China.
3. School of Public Health, Gansu University of Chinese medicine, Lanzhou, Gansu 730000, P.R. China.