1. Department of Medical Surgical and Neurological Science, Dermatology Section University of Siena S. Maria alle Scotte Hospital Siena Italy
2. Department of Pathology University Hospital of Saint‐Etienne Saint‐Etienne France
3. Department of Dermatology Hôpital Erasme Université Libre de Bruxelles Brussels Belgium
4. Institut Jules Bordet Université Libre de Bruxelles Brussels Belgium
5. Groupe d’imagerie Cutanée Non Invasive (GICNI) of the Société Française de Dermatologie (SFD) Paris France
6. Department of Dermatology CHU St. Etienne Saint‐Etienne France