1. Department of Experimental, Diagnostic and Specialty Medicine; Dermatology Unit; University of Bologna; Bologna Italy
2. Department of Surgery and Translational Medicine; Dermatology Unit; University of Florence Medical School; Florence Italy
3. Department of Experimental, Diagnostic and Specialty Medicine; Haematopathology Unit; University of Bologna; Bologna Italy
4. Department of Genetics and Genome Biology; The Hospital for Sick Children; Toronto Canada
5. Department of Experimental, Diagnostic and Specialty Medicine; Haematology Unit; University of Bologna; Bologna Italy