1. VA Nebraska‐Western Iowa Health Care System and University of Nebraska Medical Center Omaha
2. University of California Los Angeles
3. Drexel University Philadelphia Pennsylvania
4. University of Alabama at Birmingham
5. University of Texas Southwestern Dallas
6. Arthritis Centers of Texas Dallas
7. Yale University, New Haven, Connecticut, and VA Medical Center West Haven Connecticut
8. University of Nebraska Medical Center, Omaha, and FORWARD, the National Databank for Rheumatic Diseases Wichita Kansas