[1] Kyoto Prefectural Univ Med, Dept Med, Div Hematol & Oncol, Kyoto, Japan
[2] Kyoto Clin Hematol Study Grp, Kyoto, Japan
[3] Japanese Red Cross Kyoto Daiichi Hosp, Dept Hematol, Kyoto, Japan
[4] Japanese Red Cross Kyoto Daini Hosp, Dept Hematol, Kyoto, Japan
[5] Aiseikai Yamashina Hosp, Dept Hematol, Kyoto, Japan
[6] Kyoto Kuramaguchi Med Ctr, Japan Community Hlth Care Org, Dept Hematol, Kyoto, Japan
[7] Matsushita Mem Hosp, Dept Hematol, Osaka, Japan
[8] Otsu Municipal Hosp, Dept Internal Med, Otsu, Shiga, Japan