1. Department of Rheumatology and Medicine, Hospital for Joint Diseases, New York University Medical Center, New York, NY; Department of Rheumatology, Room 1608, Hospital for Joint Diseases, 301 East 17th Street, New York, NY 10003 USA
2. Department of Rheumatology, University of California at Los Angeles, Los Angeles, CA
3. Division of Arthritis/Connective Tissue Diseases, Northwestern University Medical Center, Chicago, IL
4. Department of Rheumatology, Johns Hopkins University School of Medicine
5. The Barbara Volcker Center for Women and Rheumatic Disease, Hospital for Special Surgery, New York, NY
6. Lupus Research Unit, The Rayne Institute, St. Thomas Hospital, London, UK