This ancillary study was funded by a Froedtert & MCW Cancer Center grant (project 3379013). AD is supported by K23 HL141445. The BMT CTN 0702 was supported by Grant No. U10HL069294 to the Blood and Marrow Transplant Clinical Trials Network from the National Heart, Lung, and Blood Institute and the National Cancer Institute; by Celgene Corporation and Millennium (Takeda) Pharmaceuticals; and by The Alliance for Clinical Trials in Oncology, the Eastern Cooperative Oncology Group–American College of Radiology Imaging Network Cancer Research Group, and SWOG. The content of this article is solely the responsibility of the authors and does not represent the official views of the funding parties.