[1] Univ Calif San Diego, Div Rheumatol Allergy & Immunol, La Jolla, CA 92093 USA
[2] Leeds Teaching Hosp, Dept Rheumatol, Leeds, W Yorkshire, England
[3] Univ Texas SW Med Ctr Dallas, Dept Rheumatol, Dallas, TX 75390 USA
[4] Karolinska Inst, Dept Rheumatol, Stockholm, Sweden
[5] Charles Univ Prague, Dept Rheumatol, Prague, Czech Republic
[6] Catholic Univ Louvain, Dept Rheumatol, B-1348 Louvain, Belgium
[7] Abbott, GPRD, Rungis, France
[8] Abbott, GPRD, Abbott Pk, IL USA
[9] Abbott, GPRD, Ludwigshafen, Germany
[10] Med Univ Vienna, Dept Rheumatol, Vienna, Austria
[11] Hietzing Hosp, Vienna, Austria