[1] Stanford Univ, Immunol & Rheumatol, Stanford, CA 94305 USA
[2] Regeneron Pharmaceut, Immunol & Inflammat, Tarrytown, NY USA
[3] Sanofi Genzyme, Immunol & Inflammat, Bridgewater, NJ USA
[4] Sanofi Genzyme, Rheumatol, Bridgewater, NJ USA
[5] Univ Nacl Tucuman, Immunol & Rheumatol, San Miguel De Tucuman, Tucuman, Argentina