[1] Univ Montreal, Dept Microbiol & Immunol, Immunol Lab, Montreal, PQ H3C 3J7, Canada
[2] McGill Univ, Dept Microbiol & Immunol, Montreal, PQ H3A 2B4, Canada
[3] McGill Univ, Dept Expt Med, Montreal, PQ H3A 2B4, Canada
[4] Harvard Univ, Sch Med, Ctr Blood Res, Boston, MA 02115 USA
[5] Harvard Univ, Sch Med, Dept Pediat, Boston, MA 02115 USA
[6] SmithKline Beecham Pharmaceut, Dept Med Chem, King Of Prussia, PA 19406 USA
[7] SmithKline Beecham Pharmaceut, Dept Mechanist Enzymol, King Of Prussia, PA 19406 USA
[8] SmithKline Beecham Pharmaceut, Dept Bone & Cartilage Biol, King Of Prussia, PA 19406 USA