10. Women of child-bearing potential must have a negative pregnancy test. Acceptable birth control failure rate of less than or equal to 1% when used consistently and correctly such as implants, injectables, combined oral contraceptives, double barrier, some intrauterine devices (IUDs), sexual abstinence or vasectomized partner. Subjects are considered to be not of child bearing potential if they are considered to be post-menopausal or surgically sterilized (e.g. tubal occlusion, hysterectomy, bilateral salpingectomy. Women who have been amenorrheic for 12 or more months are still considered to be of childbearing potential if the amenorrhea is possibly due to prior chemotherapy, anti-estrogens, ovarian suppression or any other reversible reason.