[1] UCL, London, England
[2] Univ Arizona, Div Rheumatol, Coll Med, Phoenix, AZ USA
[3] Med Coll Wisconsin, Milwaukee, WI 53226 USA
[4] Univ Pittsburgh, Pittsburgh, PA USA
[5] St James Hosp, Dublin, Ireland
[6] Emerson Hosp, Concord, MA USA
[7] George Washington Univ, Washington, DC USA
[8] Johns Hopkins Univ, Baltimore, MD USA
[9] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[10] Univ Cient Sur, Lima, Peru
[11] Georgetown Univ, Washington, DC USA
[12] Hop St Antoine, Paris, France
[13] Crystal Run Hlth, New York, NY USA
[14] Irish Childrens Arthrit Network, Tipperary, Ireland
[15] Boston Childrens Hosp, Boston, MA USA
[16] Univ Queensland, Brisbane, Qld, Australia
[17] McMaster Univ, Canadian Arthrit Patient Alliance, Hamilton, ON, Canada
[18] HealthPartners, St Paul, MN USA
[19] Univ Calif San Francisco, San Francisco, CA 94143 USA
[20] Boston Univ, Boston, MA 02215 USA
[21] Univ Otago, Wellington, New Zealand
[22] Massachusetts Gen Hosp, Boston, MA 02114 USA
[23] Temple Univ, Philadelphia, PA 19140 USA