In vivo effects of goldenseal, kava kava, black cohosh, and valerian on human cytochrome P450 1A2, 2D6, 2E1, and 3A4/5 phenotypes - Gurley, B J; Gardner, S F; Hubbard, M A; Williams, D K; Gentry, W B; Khan, I A; Shah, A (Clin Pharmacol Ther, 2005)