The patient’s MRI and X-ray images (if applicable) should be burned onto a CD and mailed to the coordinating center within several weeks after randomization. MRI discs should be stored in a locked file cabinet and sent in batches via FedEx (per the shipping instructions provided) to the coordinating center once a month. The CD should be labeled with the patient’s study ID. The images do not need to be de-identified. Coordinating center staff will do that once they receive the disc before the MRI is reviewed by the study radiologist.