1. Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
2. Manitoba Centre for Proteomics and Systems Biology, Department of Internal Medicine, University of Manitoba, Winnipeg, MB, Canada.
3. Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Medicas y de la Nutricion, Salvador Zubiran, Mexico City, Mexico.
4. Proteomic Core, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA.
5. Office of the Clinical Director, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
6. Division of Rheumatology and Clinical Autoimmunity Center of Excellence, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.