1. Dermatology Unit Department of Medical Surgical and NeuroSciences University of Siena Siena Italy
2. Groupe d’Imagerie Cutanée Non Invasive (GICNI) of the Société Française de Dermatologie (SFD) Paris France
3. U.O.C. Pediatria Azienda Ospedaliera Universitaria Senese Siena Italia
4. Department of Dermatology Hôpital Erasme Université Libre de Bruxelles Brussels Belgium
5. Institut Jules Bordet Université Libre de Bruxelles Brussels Belgium
6. Department of Dermatology University Hospital of Saint‐Etienne Saint‐Etienne France
7. Department of Molecular Medicine and Development University of Siena Siena Italy