[1] Leiden Univ, Dept Rheumatol, Med Ctr, Leiden, Netherlands
[2] Regeneron Pharmaceut Inc, Clin Sci, 777 Old Saw Mill River Rd, Tarrytown, NY 10591 USA
[3] Sanofi Genzyme, Bridgewater, NJ USA
[4] Sanofi Genzyme, Cambridge, MA USA
[5] Regeneron Pharmaceut Inc, 777 Old Saw Mill River Rd, Tarrytown, NY 10591 USA
[6] Univ Nacl Tucuman, Rheumatol, Yerba Buena Tucuman, Argentina
[7] Stanford Univ, Med Ctr, Palo Alto, CA 94304 USA