Data Collection Study of Patients With Non-Malignant Disorders Undergoing UCBT, BMT or PBSCT With RIC

This study is collecting data on outcomes for patients with non-cancerous (non-malignant) blood and immune disorders who undergo stem cell transplantation, to help improve transplant techniques and care for these rare conditions. **You may be eligible if...** - You are between 2 months and 60 years old - You have a non-malignant disorder that can be treated with stem cell transplantation — such as severe combined immunodeficiency (SCID), sickle cell disease, thalassemia, bone marrow failure syndromes, or metabolic storage diseases - You or your parent/guardian has given written consent **You may NOT be eligible if...** - You have a malignant (cancerous) condition - You do not meet the transplant criteria for your specific diagnosis - You are outside the age range of 2 months to 60 years Talk to your doctor to see if this trial is right for you.