1. Department of Dermatology and Venereology Medical University of Bialystok Bialystok Poland
2. Pediatric Dermatology Ospedale dell'Angelo Venezia, Ospedale San Bortolo Vicenza Vicenza Italy
3. Universitat Internacional de Catalunya Barcelona Spain
4. Department of Pediatrics O.L.Vrouw Hospital Aalst Aalst Belgium
5. Interdisciplinary Unit of Pediatric Dermatology Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel) Brussels Belgium
6. Dermatology Unit University of Campania Naples Italy