[1] Chiba Univ Hosp, Dept Hematol, Chiba, Japan
[2] Japanese Red Cross Med Ctr, Dept Hematol, Tokyo, Japan
[3] Oami Municipal Hosp, Dept Hematol, Chiba, Japan
[4] Chiba Univ, Dept Mol Oncol, Grad Sch Med, Chiba, Japan
[5] Chiba Univ Hosp, Dept Transfus Med & Cell Therapy, Chiba, Japan
[6] Chiba Univ, Dept Endocrinol Hematol & Gerontol, Grad Sch Med, Chiba, Japan
[7] Int Univ Hlth & Welf, Dept Hematol, Narita, Japan