Patients are required to stay locally in Pittsburgh up to 100 days post-transplantation. Study visits will occur at the clinic every week for the first three months after transplant and again at 4, 5, 6, 9, 12, 18, and 24 months post-transplantation. Study visits will include a physical exam and blood collection; patients will be also asked to complete a questionnaire. Patients will undergo an electrocardiogram (EKG) at Month 1, a chest x-ray at Month 6, 24-hour urine collection at Months 6 and 18, and pulmonary tests at Months 6, 12, and 24. Additional leukapheresis will be conducted at 12 and 24 months post-transplant to assess patients' health.