[1] Inst Rech Clin Montreal, Montreal, PQ H2W 1R7, Canada
[2] Univ Montreal, Dept Microbiol & Immunol, Montreal, PQ H3C 3J7, Canada
[3] Univ Duisburg Essen, Univ Hosp, Dept Haematol, D-45122 Essen, Germany
[4] Cincinnati Childrens Hosp Med Ctr, Div Cellular & Mol Immunol, Cincinnati, OH 45229 USA
[5] Cincinnati Childrens Hosp Med Ctr, Div Expt Hematol, Cincinnati, OH 45229 USA
[6] Univ Cambridge, Cambridge Inst Med Res, Cambridge CB2 0XY, England
[7] Univ Cambridge, Wellcome Trust, Cambridge Stem Cell Inst, MRC, Cambridge CB2 0XY, England
[8] McGill Univ, Div Expt Med, Montreal, PQ H3A 1A3, Canada
[9] NIAID, Immunol Lab, NIH, Bethesda, MD 20829 USA