1. Department of Medicine, Division of Hematology, Juntendo University Nerima Hospital, Tokyo, Japan;
2. Division of Hematology and Rheumatology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan;
3. Department of Hematology, Saitama Medical Center, Saitama Medical University, Saitama, Japan;
4. Department of Hematology, Juntendo University School of Medicine, Tokyo, Japan;
5. Department of Hemato-Oncology, Saitama Medical University International Medical Center, Saitama, Japan;
6. Department of Hematology, Yokohama Municipal Citizen’s Hospital, Yokohama, Japan;
7. Department of Hematology, Juntendo University Urayasu Hospital, Urayasu, Japan;
8. Department of Hematology, Saiseikai Yokohama Nanbu Hospital, Yokohama, Japan;
9. Department of Hematology and Infectious Diseases, Kumamoto University Hospital, Kumamoto, Japan