1 Dermatology Unit, Second University of Naples, Naples, Italy. Electronic address: piccolo.vincenzo@gmail.com.
2 Dermatology Unit, Second University of Naples, Naples, Italy.
3 Department of Dermatology and Venereology, Sahlgrenska University Hospital, Institute of Clinical Sciences at the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
4 Department of Advanced Biomedical Sciences, Pathology Section, University of Naples Federico II, Naples, Italy.
5 Instituto de Dermatologia, IDPRDA, Rio de Janeiro, Brazil.