1 Unit of Dermatology, Second University of Naples, Naples, Italy.
2 Department of Dermatology, Maggiore Hospital, University of Trieste, Trieste, Italy - corneli.paola@gmail.com.
3 Department of Dermatology and Venereology, Institute of Clinical Sciences at the Sahlgrenska Academy, Sahlgrenska University Hospital, University of Gothenburg, Gothenburg, Sweden.
4 Department of Dermatology, Maggiore Hospital, University of Trieste, Trieste, Italy.