2. Women of child bearing potential includes any female who has experienced menarche and who has not undergone successful surgical sterilization. Women of childbearing potential must practice true abstinence from intercourse when it is in line with their preferred and usual lifestyle, or use two different forms of highly effective contraception for the duration of the study, and for at least 30 days after discontinuing study medication. Medically acceptable forms of effective contraception include: (1) approved hormonal contraceptives (such as birth control pills), (2) barrier methods used with a spermicide, (3) an intrauterine device, or (4) partner vasectomy. For women of childbearing potential, a negative urine pregnancy test is required at Screening and Baseline prior to initiating study medication.