11. Women who are pregnant or trying to become pregnant, have a positive pregnancy test at Screening or Day -1, are currently breast-feeding, or are of childbearing potential (including perimenopausal women who have had a menstrual period within 1 year prior to Day -1) and are not willing to practice effective birth control. Women who are surgically sterile (including bilateral tubal ligation, tubal occlusion, hysterectomy or oophorectomy) are not considered to be of childbearing potential.