1. Department of Hematology, National Cancer Center Hospital , Tokyo , Japan
2. Department of Hematology Oncology, The Cancer Institute Hospital, Japanese Foundation for Cancer Research , Tokyo , Japan
3. Department of Hematology, National Hospital Organization Nagoya Medical Center , Nagoya , Japan
4. Department of Hematology, Koga Community Hospital , Shizuoka , Japan
5. Department of Hematology, Sumitomo Hospital , Osaka , Japan
6. Division of Rheumatology , Department of Internal Medicine, , Tokyo , Japan
7. Toho University School of Medicine , Department of Internal Medicine, , Tokyo , Japan
8. Pharmaceutical Science Department, Chugai Pharmaceutical Co, Ltd , Tokyo , Japan
9. Biometrics Department, Chugai Pharmaceutical Co, Ltd , Tokyo , Japan
10. Clinical Development Department, Chugai Pharmaceutical Co, Ltd , Tokyo , Japan
11. Department of Third Internal Medicine, Yamagata University Hospital , Yamagata , Japan