7. A female study participant of child-bearing potential or a male study participant and their female sexual partner(s) of child-bearing potential who are sexually active must agree to use a medically accepted method of contraception prior to enrollment while receiving protocol-specified medication and for 6 months after stopping the medication. Acceptable methods of contraception include double-barrier methods such as male or female condom in combination with spermicides, or diaphragm or cervical cap with spermicides, or medically prescribed intrauterine device. Contraceptive medication (i.e. oral contraceptives) vasectomy and tubal ligation should each be considered a single barrier.