1. Section of Rheumatology, Department of Medicine and Gwen Knapp Center for Lupus and Immunology Research, University of Chicago, Chicago, IL 60637, USA.
2. Department of Pathology, University of Chicago, Chicago, IL 60637, USA.
3. MedImmune, LLC, Department of Respiratory, Inflammation and Autoimmunity, One MedImmune Way, Gaithersburg, MD 20878, USA.
4. Integrated Microscopy Core Facility, Office of Shared Research Facilities, University of Chicago, Chicago, IL 60637, USA.
5. Department of Radiology, University of Chicago, Chicago, IL 60637, USA.