[1] Kyushu Univ, Grad Sch Med Sci, Dept Med & Biosyst Sci, Fukuoka 812, Japan
[2] Harasanshin Hosp, Dept Hematol, Fukuoka, Japan
[3] Kitakyushu Municipal Med Ctr, Dept Internal Med, Fukuoka, Japan
[4] Hamanomachi Hosp, Dept Hematol, Fukuoka, Japan
[5] Kyushu Med Ctr, Natl Hosp Org, Dept Hematol, Fukuoka, Japan
[6] Kyushu Hosp, Japan Community Healthcare Org, Dept Hematol Oncol, Kitakyushu, Fukuoka, Japan
[7] Kyushu Univ Hosp, Ctr Cellular & Mol Med, Fukuoka 812, Japan