1. III Division of Infectious Diseases, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital , Via G.B. Grassi 74 , 20157 Milan, Italy
2. I Division of Infectious Diseases, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital , Milan , Italy
3. Gestione Ambulatoriale Politerapie (GAP) Outpatient Clinic, ASST Fatebenefratelli-Sacco University Hospital , Milan , Italy