Effects of Angelica sinensis Polysaccharides on Hepatic Drug Metabolism Enzymes Activities in Mice Advantages of population pharmacokinetics and its application in the field of traditional Chinese medicine Comparison on effect of Curcuma Rhizoma before and after processed with vinegar on hepatic fibrosis in rats induced by CCl4 composited factors Effects of ferulic acid and isoferulic acid on proliferation of HepG2 cells and its cytochrome P450 enzymes Thoughts and methods for toxicity study on Chinese materia medica Thoughts and methods for toxicity study on Chinese materia medica