1. Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA.
2. Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA.
3. Department of Pathology, Yale University School of Medicine, New Haven, CT, USA.
4. Section of Rheumatology and Gwen Knapp Center for Lupus and Immunology Research, Departments of Medicine and Pathology, University of Chicago, Chicago, IL, USA.