[1] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[2] Ctr Pediat Clin Effectiveness, Philadelphia, PA USA
[3] PolicyLab, Philadelphia, PA USA
[4] Childrens Hosp Philadelphia, PolicyLab, Philadelphia, PA 19104 USA
[5] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[6] Texas Childrens Hosp, Baylor Coll Med, Immunol Allergy & Rheumatol, Houston, TX 77030 USA
[7] Monroe Carell Jr Childrens Hosp Vanderbilt, Div Pediat Rheumatol, Pediat Rheumatol, Nashville, TN USA
[8] Childrens Mercy Kansas City, Kansas City, MO USA
[9] Univ Utah, Pediat Rheumatol, Salt Lake City, UT USA
[10] Univ Chicago, Med Ctr, Pediat, Chicago, IL 60637 USA
[11] Hosp Special Surg, New York, NY 10021 USA
[12] Duke Med Ctr, Pediat, Durham, NC USA
[13] Albert Einstein Coll Med, Childrens Hosp Montefiore, New York, NY USA
[14] Univ Mississippi, Med Ctr, Jackson, MS 39216 USA
[15] Univ Mississippi, Med Ctr, Dept Pediat Rheumatol, Jackson, MS 39216 USA
[16] Boston Childrens Hosp, Boston, MA USA
[17] Harvard Med Sch, Boston, MA USA
[18] Columbia Univ, New York, NY USA
[19] Stanford Univ, Palo Alto, CA 94304 USA
[20] Univ Calif Los Angeles, Los Angeles, CA USA
[21] Univ Calif San Francisco, Dept Pediat Rheumatol, San Francisco, CA 94143 USA