1. Medical University Innsbruck Innsbruck Austria
2. Yonsei University College of Medicine and Severance Children's Hospital Seoul Republic of Korea
3. University of Pennsylvania Philadelphia
4. Hospital for Special Surgery New York New York
5. Johns Hopkins University Baltimore Maryland
6. Center for Vasculitis Care and ResearchCleveland Clinic Foundation Cleveland Ohio
7. University Medical Center Groningen The Netherlands
8. Duke University Durham North Carolina
9. Genentech, Inc. San Francisco California
10. Mayo Clinic College of Medicine Rochester Minnesota
11. Boston University School of Medicine Massachusetts
12. Massachusetts General HospitalHarvard Medical School Boston