1. VA Nebraska-Western Iowa Healthcare System; and University of Nebraska Medical Center; Omaha
2. Philadelphia VA and University of Pennsylvania; Philadelphia
3. University of Nebraska Medical Center; Omaha, and National Data Bank for Rheumatic Diseases; Wichita Kansas
4. Denver VA Medical Center; and University of Colorado; Denver
5. Denver VA Medical Center; University of Colorado; and Denver Health Medical Center; Denver
6. VA Salt Lake City Healthcare System; and University of Utah; Salt Lake City
7. Dallas VA and University of Texas Southwestern; Dallas
8. VA Medical Center; Georgetown University, and Howard University; Washington DC