1. University of Nebraska Medical Center Omaha
2. FORWARD–The National Databank for Rheumatic Diseases Wichita Kansas
3. University of Nebraska Medical Center and VA Nebraska‐Western Iowa Health Care System Omaha
4. Hospital for Special Surgery New York New York
5. University of Nebraska Medical Center, Omaha, and FORWARD–The National Databank for Rheumatic Diseases Wichita Kansas