1. Unit of Infectious Diseases, Department of Medical Sciences, University of Turin , Turin , Italy
2. Multidisciplinary Center for Sexual Health (Ce.Mu.S.S.), Ospedale Oftalmico “Casimiro Sperino”, ASL “Città di Torino” , Turin , Italy
3. Laboratory of Virology and Microbiology, Ospedale “Amedeo di Savoia”, ASL “Città di Torino” , Turin , Italy