Traditional Chinese medicines Wu Wei Zi (Schisandra chinensis Baill) and Gan Cao (Glycyrrhiza uralensis Fisch) activate pregnane X receptor and increase warfarin clearance in rats - Mu, Y; Zhang, J; Zhang, S; Zhou, H H; Toma, D; Ren, S; Huang, L; Yaramus, M; Baum, A; Venkataramanan, R; Xie, W (J Pharmacol Exp Ther, 2006)