7. Sexually active individuals capable of becoming pregnant who are unable or unwilling to use effective form(s) of contraception during time enrolled on study and for 1 year post-transplant. Effective forms of contraception include one or more of the following: intrauterine device (IUD), hormonal (birth control pills, injections, or implants), tubal ligation/hysterectomy, partners vasectomy, barrier methods, (condom, diaphragm, or cervical cap), or abstinence. The effects on breast-milk are also unknown and may be harmful to the infant; therefore, women should not breast feed during the interval from study entry to one year post-transplant. Males on the protocol must use an effective form of contraception at study entry, and for one year post-transplant. The effects of transplant, the radiation, and the medications used after transplant may be harmful to a fetus.