1. Department of Clinical and Experimental Medicine; Pediatric Hematology and Oncology Unit; AOU Policlinico Vittorio Emanuele; University of Catania; Catania Italy
2. Department of Dermatology; AOU Policlinico Vittorio Emanuele Hospital Catania; Catania Italy
3. Department of Medical and Surgery Specialties; Section of Plastic Surgery; University of Catania; Cannizzaro Hospital; Catania Italy
4. Pathology Unit; AOU Policlinico Vittorio Emanuele; University of Catania; Catania Italy