- Follow-up visits at the National Institutes of Health (NIH) Clinical Center twice a week for the first 6 months after the transplant and then less frequently for at least 5 years to evaluate response to treatment and treatment side effects. Evaluations include a bone marrow aspirate and biopsy 1 month after transplant and periodic blood tests and imaging procedures (e.g., computed tomography (CT) or magnetic resonance imaging (MRI) scans).