We thank the patients, the donors, and their families. We also thank the physicians, nurses, pharmacists, physical therapists, hematopoietic cell transplantation coordinators (Ms. Madoka Narita, Ms. Rumiko Tsuchihashi, Ms. Tomoko Amemiya, and Ms. Rina Hino), data managers (Ms. Kaori Kobayashi and Ms. Rumiko Tsuchihashi), secretariat members of the Hematopoietic Cell Transplantation Promotion Base Hospital Project (Ms. Naomi Watanabe), other co-medical staff, and support personnel for their care of the patients involved in this study.