2 Department of Dermatology, Medical University of Warsaw, Warsaw, Poland.
3 Dermatology Clinic, Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy.
4 Dermatology Unit - IRCCS Policlinico Sant'Orsola - Department of Specialized, Experimental and Diagnostic Medicine, University of Bologna, Bologna, Italy.
5 Second Dermatology Department, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki, Greece.