1. Department of Hematology; Kanagawa Cancer Center; Yokohama; Japan
2. Hematology Division; Tokyo Metropolitan Cancer and Infectious Diseases Center; Komagome Hospital; Tokyo; Japan
3. Department of Hematology; Toranomon Hospital; Tokyo; Japan
4. Division of Hematology; Saitama Medical Center; Jichi Medical University; Omiya; Japan
5. Division of Hematology; Shizuoka Red Cross Hospital; Shizuoka; Japan
6. Department of Internal Medicine; Chiba Aoba Municipal Hospital; Chiba; Japan
7. Department of Hematology; Yokohama City University Medical Center; Yokohama; Japan
8. Division of Hematology; Department of Medicine; Keio University School of Medicine; Tokyo; Japan
9. Department of Hematology and Oncology; Institute of Medical Science; University of Tokyo; Tokyo; Japan