1 Department of Dermatology and Venereology, Hospital of Merano (SABES-ASDAA), Merano Meran, Italy.
2 Department of Pathology, Provincial Hospital of Bolzano (SABES-ASDAA), Bolzano Bozen, Italy; Lehrkrankenhaus der Paracelsus Medizinischen Privatuniversitat.
3 Division of Dermatology, Galliera Hospital, Genoa, Italy.