1. Department of Dermatology; AP-HP, Henri Mondor Hospital; 51 avenue du Maréchal de Lattre de Tassigny 94000 Créteil France
2. Department of Auto-immunity and Hypersensitivity; Bichat Hospital; Paris France
3. Department of Pathology; AP-HP, Henri Mondor Hospital; 51 avenue du Maréchal de Lattre de Tassigny 94000 Créteil France
4. Department of Gastro-Enterology; Montfermeil Hospital; Montfermeil France
5. Department of Neurology; Geneva University Hospitals; Geneva Switzerland
6. Clinic of Dermatology; Geneva University Hospitals; Geneva Switzerland
7. Department of Immunology; AP-HP, Henri Mondor Hospital; 51 avenue du Maréchal de Lattre de Tassigny 94000 Créteil France
8. Université Paris-Est Créteil Val de Marne; Créteil France
9. INSERM; Centre d'Investigation Clinique 006, AP-HP; Créteil France