1. Department of Radiation Emergency Medicine, National Institute of Radiological Sciences, Chiba, Japan;
2. Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University School of Medicine, Yamagata, Japan;
3. Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan;
4. Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan;
5. Department of Hematology/Oncology, Internal Medicine, Iwate Medical University, Morioka, Japan;
6. Department of Hematology, Aomori Prefectural Central Hospital, Aomori, Japan;
7. Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan;
8. Division of Hematology, Department of Internal Medicine, Miyagi Cancer Center, Natori, Japan;
9. Department of Hematology, Iwate Prefectural Hospital, Morioka, Japan;
10. Department of Medical Oncology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan