Study on immunomodulatory activity of root and rhizome of Rosa laevigata from different habitats Immunomodulatory Function of Sheep Bone Papain and Trypsin Hydrolysates Effect of Polyporus umbellatus polysaccharides on activation of murine bone marrow dendritic cells via Toll-like receptor 4 Studies on immunomodulatory activity of fraction 3A from LIUWEIDIHUANG DECOCTION Effect of Polyporus umbellatus polysaccharides on activation of murine bone marrow dendritic cells via Toll-like receptor 4 Research progress on pharmacological activities of betulinic acid Effect of different fractions from DANGGUI BUXUE TANG on immunological function in normal and blood-deficiency mouse