[1] Hosp Special Surg, Weill Cornell Med, 535 E 70th St, New York, NY 10021 USA
[2] Columbia Univ, New York, NY USA
[3] UT Southwestern Med Ctr, Dallas, TX USA
[4] Univ Calif San Francisco, San Francisco, CA USA
[5] Mayo Clin, Rochester, MN USA
[6] Hosp Sick Children, Toronto, ON, Canada
[7] Ohio State Univ, Columbus, OH USA
[8] Boston Childrens Hosp, Boston, MA USA
[9] Kaiser Permanente, Sacramento, CA USA
[10] Feinstein Inst Med Res, Manhasset, NY USA
[11] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[12] Hackensack Univ, Med Ctr, Hackensack, NJ USA
[13] Univ Cincinnati, Cincinnati Childrens Hosp, Coll Med, Cincinnati, OH USA
[14] Yale Univ, Sch Med, New Haven, CT USA
[15] Univ Miami, Miami, FL USA
[16] Alaska Native Tribal Hlth Consortium, Anchorage, AK USA
[17] Univ North Carolina, Chapel Hill, NC USA
[18] Univ Utah, Salt Lake City, UT USA
[19] NYU, Grossman Sch Med, New York, NY USA
[20] Univ Calif San Diego, San Diego, CA USA
[21] Med Univ South Carolina, Charleston, SC USA
[22] Florida State Univ, Tallahassee, FL USA
[23] Cent Texas Vet Hlth Care Syst, Temple, TX USA
[24] Johns Hopkins Univ, Baltimore, MD USA
[25] Cedars Sinai, Los Angeles, CA USA
[26] Verier Outcomes Res LLC, Rockville, MD USA
[27] Univ Kansas, Kansas City, MO USA
[28] Univ Wisconsin, Madison, WI USA
[29] Brown Univ, Warren Alpert Med Sch, East Providence, RI USA
[30] Univ Penn, Philadelphia, PA USA
[31] Mayo Clin, Rochester, MN USA
[32] Univ Autonoma Nuevo Leon, Univ Hosp Dr Jose Eleuterio Gonzalez, Monterrey, Nuevo Leon, Mexico
[33] Hosp Salvador, Santiago, Chile
[34] Univ Calif Irvine, Med Ctr, Orange, CA USA
[35] Carolina Arthrit Ctr, Greenville, NC USA
[36] Massachusetts Gen Hosp, Boston, MA USA
[37] Tufts Med Ctr, Boston, MA USA
[38] Dalhousie Univ, Halifax, NS, Canada
[39] Georgetown Univ Hosp, Washington, DC USA
[40] Amer British Cowdray Med Ctr IAP, Dept Internal Med, Mexico City, Mexico
[41] Amer Coll Rheumatol, Atlanta, GA USA
[42] Washington Univ, St Louis, MO USA