Impact of the haplotypes of the human pregnane X receptor gene on the basal and St Johnʼs wort-induced activity of cytochrome P450 3A4 enzyme - Wang, X D; Li, J L; Su, Q B; Guan, S; Chen, J; Du, J; He, Y W; Zeng, J; Zhang, J X; Chen, X; Huang, M; Zhou, S F (Br J Clin Pharmacol, 2009)