<qa>  What is a female of childbearing potential?- Women of child bearing potential must have a negative serum or urine pregnancy test within 14 days prior to study registration and agree to use adequate birth control during study treatment. A female of childbearing potential FCBP is a sexually mature female who: 1 has not undergone a hysterectomy or bilateral oophorectomy; or 2 has not been naturally postmenopausal for at least 24 consecutive months i.e., has had menses at any time in the preceding 24 consecutive months. 