[1] Charite Univ Med Berlin, Berlin, Germany
[2] MedImmune, Gaithersburg, MD USA
[3] MedImmune, Cambridge, England
[4] Ctr Estudios Reumatol, Santiago, Chile
[5] Inst Rheumatol, Prague, Czech Republic
[6] Albany Med Coll, Albany, NY 12208 USA
[7] Univ Glasgow, Glasgow, Lanark, Scotland
[8] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA