1. Division of Hematology, Saitama Medical Center; Jichi Medical University; Saitama Japan
2. Stem Cell Transplantation Division; National Cancer Center Hospital; Tokyo Japan
3. Department of Hematology; Toranomon Hospital; Minato-Ku Tokyo Japan
4. Department of Hematology; Japanese Red Cross Nagoya First Hospital; Nagoya Japan
5. Cellular Transplantation Biology; Kanazawa University Graduate School of Medical Science; Japan
6. Division of Hematology and Oncology, Department of Medicine; Kurume University School of Medicine; Japan
7. Department of Medicine and Biosystemic Science; Kyushu University Graduate School of Medical Sciences; Fukuoka Japan
8. Department of Hematology and Oncology, Graduate School of Medicine; University of Tokyo; Tokyo Japan
9. Department of Hematology; University of Tsukuba; Tsukuba Japan
10. Department of Biostatistics, School of Public Health; University of Tokyo; Tokyo Japan
11. Institute for Research, St. Luke's International Hospital; Tokyo Japan