1. State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy and Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education) Guizhou Medical University Guiyang 550004 P.R. China
2. Department of Neurology Sichuan Mianyang 404 Hospital Mianyang 621000 P.R. China
3. Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education Guizhou Medical University Guiyang 550025 P.R. China