<qa>  What is the only method that women must not be able to become pregnant for the duration of6. Women must not be able to become pregnant e.g. post menopausal, surgically sterile, or using adequate birth control methods for the duration of the study and 3 months after study completion. Adequate contraception includes: abstinence, hormonal contraception oral contraception, implanted contraception, injected contraception or other hormonal patch or contraceptive ring, for example contraception, intrauterine device IUD in place for 3 months, barrier method in conjunction with spermicide, or another adequate method. 