Studies on the Immunoregulative Action of Polysaccharide Isolated from Hyphal Bodies of Lentinnus edodes (PHL)on Hypoimmunity in Mice Effects of Chinese Angelica Tuber (Angelica sinensis) Ethanol Sediments on Mice Spleen and Thymus Lymphocytes Proliferation in vitro Preparation of Polysaccharide from Porphyra yezoensis Ueda and Its Effects on Growth of Lymphocytes Immunocompetence effects of polysaccharide of snakegourd root on human peripheral blood mononuclear cells in vitro Effects of Ranjiangduoji capsule on cytokines and inflammation mediators of adjuvant arthritis in rats Study on in vivo antiviral activity of four diterpenoids from ethanol extracts of Euphorbia kansui