1. Department of Dermatology Rouen University Hospital and INSERM U905 Centre de Référence des Maladies Bulleuses Autoimmunes Normandie University Rouen France
2. Department of Biostatistics Rouen University Hospital and INSERM U1219 Normandie University Rouen France
3. Department of Dermatology University of Paris XIII Bobigny France
4. Department of Dermatology Claude Huriez University Hospital University of Lille Lille France
5. Department of Dermatology Jacques Monod Le Havre University Hospital Montivilliers France
6. Department of Dermatology St George Hospital University of New South Wales Sydney NSW Australia