1. The subject is a woman of child-bearing potential (not surgically sterile or post-menopausal for at least 1 year as documented in medical history), but is not using a highly effective method of contraception [oral, injected or implanted hormonal methods of contraception; intrauterine device (IUD) or intrauterine system (IUS); condom or occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/suppository; or male sterilization (vasectomy)].