1. Department of Hematology, National Cancer Center Hospital, Tokyo, Japan,
2. Department of Hematology, National Hospital Organization Nagoya Medical Center, Nagoya, Japan,
3. Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan,
4. Department of Hematology and Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan,
5. Department of Hematology, Kobe City Medical Center General Hospital, Kobe, Japan,
6. Janssen Pharmaceutical K.K., Tokyo, Japan