1. Department of Dermatology; Hospital Clínic. Universitat de Barcelona; Barcelona Spain
2. Department of Internal Medicine and Medical Intensive Care Unit; Hospital Clínic. Universitat de Barcelona; Barcelona Spain
3. Department of Pathology; Hospital Clínic. Universitat de Barcelona; Barcelona Spain
4. Department of Autoimmune Diseases; Hospital Clínic. Universitat de Barcelona; Barcelona Spain
5. Division of Rheumatology; Johns Hopkins University School of Medicine; Baltimore MD USA