1. Division of Rheumatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
2. Division of Pulmonary & Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
3. Department of Dermatology, Emory University School of Medicine, Atlanta, GA, USA
4. Atlanta Veterans Administration Medical Center and Winship Cancer, Atlanta, GA, USA
5. Department of Pathology, Northwestern University, Chicago, IL, USA
6. Department of Surgery, University of Chicago, Chicago, IL, USA
7. Jesse Brown VA Medical Center, Chicago, IL, USA