Patients will be in the hospital for about 3-4 weeks. Patients will have checkups every day until discharged from the hospital then 3 times a week until their blood counts improve. Patients will then be seen by their doctor at least every week until 100 days after the bone marrow transplant. Patients must stay in Houston during this time. After 100 days, patients will return at least every 3 months for the first year, then every 6 months for an additional two years.