1. Veterans Affairs Nebraska-Western Iowa Health Care System, and University of Nebraska Medical Center; Omaha
2. Veterans Affairs Nebraska-Western Iowa Health Care System, University of Nebraska Medical Center, Omaha, and National Data Bank for Rheumatic Diseases; Wichita Kansas
3. Denver VAMC and University of Colorado; Denver
4. Denver VAMC, University of Colorado, and Denver Health Medical Center; Denver Colorado
5. Veterans Affairs Salt Lake City Health Care System and University of Utah School of Medicine; Salt Lake City
6. Dallas Veterans Affairs and University of Texas Southwestern; Dallas
7. Washington, DC, Veterans Affairs Medical Center and Georgetown and Howard Universities; Washington DC
8. Portland Veterans Affairs Health Care System and Oregon Health and Sciences University; Portland
9. Philadelphia VAMC and University of Pennsylvania School of Medicine; Philadelphia