[1] Univ Montreal, Inst Res Immunol & Canc, Montreal, PQ H3C 3J7, Canada
[2] Univ Montreal, Dept Med, Montreal, PQ H3C 3J7, Canada
[3] Hop Maison Neuve Rosemont, Div Hematol, Montreal, PQ H1T 2M4, Canada
[4] Univ Montreal, Dept Pathol Cell Biol, Montreal, PQ, Canada
[5] Juntendo Univ, Sch Med, Dept Immunol, Tokyo 113, Japan