Jichi Medical University - Division of Hematology, Komagome Hospital, National Cancer Center Hospital, Keio University - School of Medicine, Jichi Medical University Saitama Medical Center, Kanagawa Cancer Center, National Cancer Center Hospital - Department of Hematopoietic Stem Cell Transplantation, Komagome Hospital, Chiba University, Chiba University, Tokai University, Yokohama City University, Saiseikai Maebashi Hospital, National Cancer Center Hospital - Department of Hematopoietic Stem Cell Transplantation, Japanese Red Cross Medical Center, Komagome Hospital - Hematology Division, Yokohama City University, Yokohama City University, Keio University - School of Medicine, Nihon University, Institute of Science Tokyo, Jichi Medical University Saitama Medical Center, Kanagawa Cancer Center, Jichi Medical University - Division of Hematology, Gunma University, Saitama University - Saitama Medical University, Japanese Red Cross Narita Hospital, International University of Health and Welfare, Tokyo - International University of Health and Welfare Graduate School, Jichi Medical University - Division of Hematology and Independent