1. Department of Public Health—Microbiology—Virology, Università degli Studi di Milano, Milan, Italy
2. Department of Dermatology, Scientific Institute, S. Raffaele Hospital, Milan, Italy
3. Microbioloy Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena, Milan, Italy
4. Laboraf, San Raffaele Scientific Institute, Milan, Italy