[1] Oregon Hlth & Sci Univ, Portland, OR 97239 USA
[2] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[3] Hosp Special Surg, 535 E 70th St, New York, NY 10021 USA
[4] Charite Univ Med Berlin, Berlin, Germany
[5] Univ Washington, Swedish Med Ctr, Seattle, WA 98195 USA
[6] Univ Lausanne, Lausanne, Switzerland
[7] Amsterdam Rheumatol & Immunol Ctr, Amsterdam, Netherlands
[8] Hop Cochin, Paris, France
[9] Univ Massachusetts, Med Sch, Worcester, MA 01605 USA
[10] Paris Sud Univ, Orsay, France
[11] Charite, Campus Benjamin Franklin, Dept Gastroenterol Infect Dis & Rheumatol, Berlin, Germany
[12] Max Planck Inst Infect Biol, Berlin, Germany
[13] Deutsch Rheumaforschungszentrum, Berlin, Germany
[14] NYU, Sch Med, New York, NY USA
[15] NIH, Bldg 10, Bethesda, MD 20892 USA
[16] Leiden Univ, Med Ctr, Leiden, Netherlands
[17] Univ Erlangen Nurnberg, Erlangen, Germany
[18] Med Univ Vienna, Dept Med 3, Div Rheumatol, Vienna, Austria
[19] Univ Calif Los Angeles, Los Angeles Med Ctr, Los Angeles, CA USA
[20] Univ Florence, Florence, Italy