1. Section of Rheumatology, Department of Medicine; Gwen Knapp Center for Lupus and Immunology Research; Molecular Pathogenesis and Molecular Medicine Graduate Program, Department of Pathology; and Committee on Immunology; University of Chicago, Chicago, IL 60637
2. Immunobiology and Cancer Research Program and Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104
3. Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104