CYP2B6(C.516G>T)and CYP2A6(*9B and *17) polymorphisms are independent preictors of efavirenz plasma concentrations in HIV -infected patients, - Kwara, A.; Lartey, M.; Rzek, N.L; Court, M.H. (Br. Journal Clin. Pharmacol (67): 427-36, 2009)