[1] Toranomon Gen Hosp, Dept Hematol, Tokyo, Japan
[2] Natl Canc Ctr Hosp, Dept Med Oncol, Hematopoiet Stem Cell Transplantat Unit, Tokyo, Japan
[3] Hamanoumachi Hosp, Div Hematol, Fukuoka, Japan
[4] Tokyo Univ Hosp, Dept Hematol & Oncol, Tokyo 113, Japan
[5] Jichi Med Sch, Div Cell Transplantat & Transfus, Minami Kawachi, Tochigi 32904, Japan
[6] Sapporo Hokuyu Hosp, Dept Internal Med, Sapporo, Hokkaido, Japan