1. Department of Hematology, Chiba Aoba Municipal Hospital
2. Department of Hematology, Chiba University Hospital
3. Department of Hematology and Oncology, Japanese Red Cross Narita Hospital
4. Department of Hematology, Asahi General Hospital
5. Department of Internal Medicine, JCHO Funabashi Central Hospital
6. Department of Hematology, Chibaken Saiseikai Narashino Hospital
7. Department of Hematology and Oncology, Chiba Cancer Center
8. Department of Hematology, Oami Municipal Hospital
9. Department of Hematology, Chiba Rosai Hospital, Japan