[1] Tohoku Univ, Dept Hematol & Rheumatol, Grad Sch Med, Sendai, Miyagi, Japan
[2] Tohoku Univ Hosp, Diagnost Lab, Sendai, Miyagi, Japan
[3] Tohoku Univ Hosp, Dept Hematol & Rheumatol, Sendai, Miyagi, Japan
[4] RIKEN BioResource Res Ctr, Cell Engn Div, Tsukuba, Ibaraki, Japan