1. Department of Medicine III, University Medical Center Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
2. Lupus Erythematodes Selbsthilfegemeinschaft e.V., Wuppertal, Germany
3. Department of Medicine, University of California, San Francisco, USA
4. Department of Veterans Affairs Medical Center, USA
5. Department of Medicine, Rheumatology, and Clinical Immunology, Charité Universitätsmedizin and Deutsches Rheuma-Forschungszentrum, Berlin, Germany
6. Division of Rheumatology, Department of Medicine, Toronto Western Hospital, University of Toronto, Toronto, Canada
7. Mount Sinai Hospital, Toronto, Canada