[1] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[2] UCL, London, England
[3] Med Coll Wisconsin, Brookfield, WI USA
[4] Hosp Special Surg, 535 E 70th St, New York, NY 10021 USA
[5] St James Univ Hosp, Dublin, Ireland
[6] Emerson Hosp, Concord, MA USA
[7] George Washington Univ, Washington, DC USA
[8] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[9] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[10] Harvard Med Sch, Boston, MA 02115 USA
[11] Essalud Univ Cientif Sur, Hosp Guillermo Almenara Irigoyen, Lima, Peru
[12] Georgetown Univ, Sch Med, Melbourne, FL USA
[13] Sorbonne Univ, Hop St Antoine, Paris, France
[14] Crystal Run Hlth, Montvale, NJ USA
[15] Boston Childrens Hosp, Beth Israel Deaconess Med Ctr, Cambridge, MA USA
[16] UCL, Ctr Rheumatol, London, England
[17] UCL, Dept Neuromuscular Dis, London, England
[18] Univ Queensland, Sch Clin Med, Brisbane, Qld, Australia
[19] Univ Queensland, Sch Clin Med, Herston, Qld, Australia
[20] McMaster Univ, Hamilton, ON, Canada
[21] HealthPartners, Eagan, MN USA
[22] Univ Calif San Francisco, San Francisco, CA 94143 USA
[23] Boston Univ, Boston, MA 02215 USA
[24] Univ Otago, Wellington, New Zealand
[25] Massachusetts Gen Hosp, Newton, MA USA
[26] Temple Univ, Philadelphia, PA 19122 USA