1. Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy.
2. Infectious Diseases Clinics, Azienda Ospedaliero-Universitaria, Modena, Italy.
3. Department of Oncology, Hematology and Respiratory System Diseases, University of Modena and Reggio Emilia, Modena, Italy.