1. Veterans Affairs Nebraska–Western Iowa Health Care System, Omaha, Nebraska
2. Division of Rheumatology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
3. Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha
4. Section of Rheumatology, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
5. Horizon Therapeutics, Deerfield, Illinois