[1] Tokyo Med & Dent Univ, Grad Sch Med & Dent Sci, Dept Hematol, Tokyo, Japan
[2] Natl Res Inst Child Hlth & Dev, Dept Infect Dis, Tokyo, Japan
[3] Toranomon Gen Hosp, Dept Pathol, Tokyo, Japan
[4] Toranomon Gen Hosp, Dept Hematol, Tokyo, Japan
[5] Tokyo Med & Dent Univ, Dept Pharmacovigilance, Grad Sch Med & Dent Sci, Tokyo, Japan