[1] Washington Univ, Sch Med, Dept Pediat, Div Pediat Rheumatol, St Louis, MO 63110 USA
[2] Karolinska Inst, Ctr Microbiol & Tumor Biol, Stockholm, Sweden
[3] Univ Calif San Francisco, San Francisco, CA 94143 USA
[4] Wyeth Res, Genet Inst, Cambridge, MA 02140 USA
[5] Univ Roma La Sapienza, Dept Expt Med & Pathol, Rome, Italy
[6] Univ Mediterranee, INSERM, CNRS, Ctr Immunol Marseille Luminy, Marseille, France
[7] Washington Univ, Sch Med, Dept Med, Howard Hughes Med Inst, St Louis, MO 63110 USA
[8] Washington Univ, Sch Med, Dept Med, Div Rheumatol, St Louis, MO 63110 USA