Protopanaxatriol-Type Ginsenosides Differentially Modulate Type 1 and Type 2 Cytokines Production from Murine Splenocytes - Yu, Jun-Li; Dou, De-Qiang; Chen, Xiao-Hong; Yang, Hong-Zhen; Guo, Na; Cheng, Gui-Fang (Planta Medica, 2005)