[1] Univ Leeds, Leeds, W Yorkshire, England
[2] Univ Oxford, Oxford, England
[3] St Vincents Univ Hosp, Dublin, Ireland
[4] Univ Coll Dublin, Dublin, Ireland
[5] Harvard Med Sch, Brigham & Womens Hosp, Boston, MA USA
[6] Med Univ Vienna, Vienna, Austria
[7] Univ Amsterdam, Acad Med Ctr, Amsterdam, Netherlands
[8] GRAPPA, Oslo, Norway
[9] People Arthrit Rheumatism Europe, Zurich, Switzerland
[10] Univ Hosp Geneva, Geneva, Switzerland
[11] Univ Utah, Salt Lake City, UT USA
[12] GRAPPA, Toronto, ON, Canada
[13] Toronto Western Hosp, Toronto, ON, Canada
[14] Univ Hlth Network, Toronto, ON, Canada
[15] EMGO Res Inst, Amsterdam, Netherlands
[16] Univ Toronto, Toronto, ON, Canada
[17] Univ Hlth Network, Toronto Western Hosp, Toronto, ON, Canada
[18] New York Med Coll, Valhalla, NY 10595 USA
[19] GRAPPA, Bath, Avon, England
[20] Univ Calif San Diego, San Diego, CA 92103 USA
[21] Copenhagen Univ Hosp, Copenhagen, Denmark
[22] Diakonhjemmet Hosp, Oslo, Norway
[23] Univ Hosp Munster, Munster, Germany
[24] Univ Bath, Bath, Avon, England
[25] Univ Washington, St Joseph Hlth Syst, St Joseph, MO USA
[26] Univ Queensland, Brisbane, Qld, Australia
[27] Univ Penn, Philadelphia, PA 19104 USA
[28] Stanford Univ, Palo Alto, CA 94304 USA
[29] Univ Bath, Bath, Avon, England
[30] Univ Leeds, Leeds, W Yorkshire, England