The CYP2D6 genotype was statistically associated with 4 OH TAM levels p 0 buy cheap generic cialis uk To compare the efficacy and tolerability of anastrozole 1 and 10 mg once daily, a selective, oral, nonsteroidal aromatase inhibitor, and megestrol acetate 40 mg four times daily, in postmenopausal women who progressed following tamoxifen treatment