 9. If the participant is a sexually active woman of childbearing potential, evidence that she is practicing adequate contraception during the treatment period. Adequate contraception includes use of an intrauterine device, oral contraceptives, progesterone implanted rods, medroxyprogesterone acetate, surgical sterilization, barrier method diaphragm spermicide, a monogamous relationship with a male partner who has had a vasectomy or is using a condom spermicide or a birth control method acceptable to the study physicians. Participants andor their partners must agree to continue the use of adequate contraception for at least 6 months following completion of treatment. 