1. University of Utah Salt Lake City
2. University of Utah, George E. Wahlen Veterans Affairs, and Salt Lake City Health Care System Salt Lake City Utah
3. Nationwide Children's Hospital Columbus Ohio
4. Independent San Diego California United States
5. American College of Rheumatology Atlanta Georgia
6. University of California San Diego La Jolla
7. Birmingham Veterans Affairs Medical Center Birmingham Alabama
8. University of California Los Angeles Medical Center Sylmar
9. University of Rochester Medical Center Rochester New York
10. Duke University Durham North Carolina