1. Philadelphia VA Medical Center and University of Pennsylvania; Philadelphia
2. Salt Lake City VA Medical Center and University of Utah; Salt Lake City
3. University of Nebraska Medical Center, Omaha, and National Data Bank for Rheumatic Diseases; Wichita Kansas
4. Center for Health Equity Research and Promotion, Philadelphia VA Medical Center, and University of Pennsylvania; Philadelphia
5. Denver VA Medical Center; Denver Colorado
6. University of Nebraska Medical Center, Omaha, VA Nebraska-Western Iowa Health Care System; Omaha Nebraska