1. Department of Internal Medicine and Clinical Immunology; Yokohama City University Graduate School of Medicine; Yokohama; Japan
2. Department of Medical Oncology; Kanagawa Cancer Center; Japan
3. Department of Hematology; Yokohama City University Medical Center; Yokohama; Japan
4. Department of Hematology and Immunology; Fujisawa City Hospital; Fujisawa; Japan
5. Department of Hematology; Shizuoka Red Cross Hospital; Shizuoka; Japan
6. Department of Hematology; Yokosuka City Hospital; Yokosuka; Japan
7. Department of Internal Medicine; Yokohama Ekisaikai Hospital; Yokohama; Japan
8. Department of Hematology; Yamato Municipal Hospital; Yamato; Japan