[1] Univ Turin, Dept Microbiol & Publ Hlth, Virol Unit, IT-10132 Turin, Italy
[2] Univ Turin, Dept Biomed Sci & Human Oncol, Dermatol Sect, IT-10132 Turin, Italy
[3] CTO Hosp, Dept Plast Surg, Turin, Italy
[4] CTO Hosp, Burn Unit Skin Bank, Turin, Italy