[1] Med Univ Vienna, Vienna, Austria
[2] Hietzing Hosp, Vienna, Austria
[3] Karolinska Inst, Stockholm, Sweden
[4] Univ Calif San Diego, San Diego, CA 92103 USA
[5] Stanford Univ, Palo Alto, CA 94304 USA
[6] Charles Univ Prague, Dept Clin & Expt Rheumatol, Inst Rheumatol, Fac Med 1, Prague, Czech Republic
[7] Univ Colorado, Denver, CO 80202 USA
[8] Acad Med Ctr Amsterdam, Heerlen, Netherlands
[9] Atrium Med Ctr, Heerlen, Netherlands
[10] Ctr Hosp Univ Montreal, Montreal, PQ, Canada
[11] UCB Pharma, Raleigh, NC USA
[12] Leiden Univ, Med Ctr, Leiden, Netherlands