Effects of Liuwei Dihuang Decoction and Its Compositions on Blood Sugar and Glycogen in Mice Determination and Study of Inorganic Elements in Liuwei Dihuang Decoction by ICP-AES The Absorption of Fe, Zn, Cu in Siwu Decoction, Sijunzi Decoction and Liuwei Dihuang Decoction by Small Intestine in Rats Contents and Solubilities of Several Elements in Siwu Decoction and Liuwei Dihuang Decoction Study on Anticancer Element Selenium in Liuwei Dihuang Decoction Effect of Liuwei Dihuang Decoction, on the Cytokine Expression in Splenocytes in AA Rats Optimization on alcohol precipitation techniques of Liuwei Dihuang decoction by response surface methodology