Principle of the Bark of Phellodendron amurense to Suppress the Cellular Immune Response: Effect of Phellodendrine on Cellular and Humoral Immune Responses - Mori, Hiroshi; Fuchigami, Masahiro; Inoue, Naoki; Nagai, Hiroichi; Koda, Akihide; Nishioka, Itsuo; Meguro, Kazuo (Planta Medica, 1995)