1. Department of Dermatology, Inselspital Bern University Hospital Bern Switzerland
2. Department of Dermatology, Venereology and Leprology Postgraduate Institute of Medical Education and Research Chandigarh India
3. Department of Dermatology Rouen University Hospital and INSERM U905 Centre de référence des maladies bulleuses autoimmunes Normandie University Rouen France