7. Sexually active women of childbearing potential must use birth control during study in manner that risk of failure is minimized. Prior to study enrollment women of childbearing potential must be advised of importance of avoiding pregnancy during trial and potential risk factors for unintentional pregnancy. MUST have negative pregnancy test. If pregnancy test is positive patient must not receive investigational product and must not be enrolled in study. Men enrolled on study should understand risks to sexual partner of childbearing potential and practice effective birth control.