[1] Med Univ Vienna, Dept Rheumatol, Vienna, Austria
[2] Hietzing Hosp, Vienna, Austria
[3] Univ Texas SW, Dept Med, Dallas, TX USA
[4] Leeds Teaching Hosp, Dept Rheumatol, Leeds, W Yorkshire, England
[5] Karolinska Inst, Dept Rheumatol, Stockholm, Sweden
[6] Abbott, GPRD, Rungis, France
[7] Abbott, GPRD, Abbott Pk, IL USA
[8] Abbott GmbH & Co, GPRD, Ludwigshafen, Germany
[9] Univ Calif San Diego, Dept Rheumatol, La Jolla, CA 92093 USA