Immunoenhancing activity of protopanaxatriol-type ginsenoside-F3 in murine spleen cells Jun-li YU, De-qiang DOU, Xiao-hong CHEN, Hong-zhen YANG, Na GUO, Gui-fang CHENG Abstract Immunoenhancing activity of protopanaxatriol-type ginsenoside-F3 in murine spleen cells Keywords: