1. VA Nebraska‐Western Iowa Health Care System and University of Nebraska Medical Center Omaha
2. University of Nebraska Medical Center Omaha
3. University of Nebraska Medical Center, Omaha, and FORWARD—The National Databank for Rheumatic Diseases Wichita Kansas
4. VA Salt Lake City Health Care System and University of Utah
5. Corporal Michael J. Crescenz VAMC and University of Pennsylvania Philadelphia