1 Department of Dermatology, Université Côte d'Azur, Nice 06200, France.
2 Department of Pathology, Université Côte d'Azur, Nice 06200, France; Department of Virology, Université Côte d'Azur, Nice 06200, France.
3 Department of Dermatology, Université Côte d'Azur, Nice 06200, France; Department of Virology, Université Côte d'Azur, Nice 06200, France; Centre Hospitalier Universitaire de Nice, and INSERM U1065, Université Côte d'Azur, Nice 06200, France. Electronic address: passeron@unice.fr.