[1] Kansai Med Univ, Dept Internal Med 1, Osaka, Japan
[2] Tokyo Univ Hosp, Dept Cell Therapy & Transplantat Med, Tokyo 113, Japan
[3] Tokyo Metropolitan Komagome Hosp, Div Hematol, Tokyo, Japan
[4] Keio Univ, Sch Med, Div Hematol, Tokyo, Japan
[5] Nagoya First Hosp, Japanese Red Cross, Dept Internal Med, Nagoya, Aichi, Japan
[6] Natl Canc Ctr, Hematopoiet Stem Cell Transplantat Unit, Tokyo 104, Japan
[7] Univ Tokyo, Inst Med Sci, Dept Hematol Oncol, Tokyo, Japan
[8] Gunma Univ, Grad Sch med, Dept Med & Clin Sci, Gunma, Japan
[9] Nagoya Univ, Grad Sch Med, Dept Prevent Med Biostat & Med Decis Making, Nagoya, Aichi, Japan
[10] Sapporo Hokuyu Hosp, Dept Internal Med, Sapporo, Hokkaido, Japan
[11] Tokai Univ, Sch Med, Dept Cell Transplantat & Regenerat Med, Isehara, Kanagawa 25911, Japan