 7. Females of childbearing potential FCBP must agree to utilize two reliable forms of contraception simultaneously or practice true abstinence when this is in line with the preferred and usual lifestyle of the subject. Periodic abstinence e.g., calendar, ovulation, symptothermal, post ovulation methods and withdrawal are not acceptable methods of contraceptionfrom heterosexual contact for at least 28 days before starting study drug, while participating in the study including dose interruptions, and for at least 28 days after study treatment discontinuation and must agree to regular pregnancy testing during this timeframe. 