1. University of Pittsburgh; Pittsburgh Pennsylvania
2. Seattle Children's Hospital; Seattle Washington
3. University of Michigan; Ann Arbor
4. Boston University School of Medicine; Boston Massachusetts
5. Toronto Western Hospital; Mount Sinai Hospital, and University of Toronto; Toronto Ontario Canada
6. American College of Rheumatology; Atlanta Georgia
7. Cincinnati Children's Hospital and Medical Center; Cincinnati Ohio
8. University of California; Los Angeles
9. University of Pennsylvania; Philadelphia
10. Medical University of Vienna; Vienna Austria
11. Toronto Western and Mount Sinai Hospitals; The Hospital for Sick Children, and University of Toronto; Toronto Ontario Canada