1. Division of Rheumatology, Johns Hopkins University, Baltimore, MD, USA
2. Division of Clinical Immunology and Rheumatology, Pontificia Universidad Católica de Chile, Santiago, Chile
3. Department of Dermatology
4. Department of Internal Medicine
5. Department of Radiology, Stanford University School of Medicine, Stanford
6. Division of Immunology and Rheumatology, Stanford University School of Medicine, Palo Alto
7. Division of Immunology and Rheumatology, VA Palo Alto Health Care System, Palo Alto, CA, USA