have been surgically sterilized or hysterectomized at least 6 months prior to study participation, or have had surgical bilateral oophorectomy (with or without hysterectomy) or tubal ligation at least six weeks prior to study participation. In the case of oophorectomy alone, only when the reproductive status of the woman has been confirmed by follow- up hormone level assessment is she considered not of child bearing potential, Surgical sterilization procedures or hysterectomy must be supported with clinical documentation made available to the sponsor and noted in the Relevant Medical History / Current Medical Conditions section of the CRF, OR be postmenopausal. Female subjects are considered post-menopausal and not of child bearing potential if they have had 12 months of natural (spontaneous) amenorrhea with an appropriate clinical profile (e.g. age appropriate, history of vasomotor symptoms). Female subjects 60 years of age or younger must confirm menopause by the demonstration of a plasma FSH level in the postmenopausal range according to the lab normal range. Documentation of a prior plasma FSH level is acceptable