2. Females of childbearing potential must have a negative urine pregnancy test on Baseline/Day 0 and must agree to use adequate birth control methods during the entire study (a barrier method {condoms, diaphragm}; hormonal contraceptives {birth control pills, implants [Norplant] or injections [DepoProvera]}; intrauterine device {IUD}; or abstinence {no sexual activity}).