Participants in this research database are 1) any recipient whose Hematopoietic Stem Cell (HSC) transplant is facilitated by the National Marrow Donor Program (NMDP) and 2) all donors registered on the NMDP Registry who have been requested to donate a product for a recipient.
The following are types of studies in which subject's study data may be included. These are studies to: 1. Determine how well recipients recover from their transplant; 2. Determine how recovery after a transplant can be improved; 3. Determine how access to transplant for different groups of patients can be improved; 4. Determine how well donors recover from the collection procedures.