3. Females should be either postmenopausal (at least 12 months since last menses) or surgically sterilized (bilateral tubal ligation or hysterectomy). Menopausal status will be verified by a follicle-stimulating hormone (FSH) test. If FSH levels are below 40 mIL/mL, some method of birth control must be used. Those with bilateral tubal ligation must also use a barrier method of birth control. In addition, all females must have a negative pregnancy test at Screen and Day 15 regardless of childbearing potential. Males with female partners of child-bearing potential must agree to use adequate contraceptive methods (including a condom, plus one other form of contraception) if engaging in sexual intercourse.