1. Department of Biomedical Sciences, Section of General Pathology, University of Modena and Reggio Emilia School of Medicine, Modena, Italy
2. Laboratory of Clinical Immunology, San Raffaele Scientific Institute, 20127 Milano, Italy
3. Infectious Disease Clinics, University of Modena and Reggio Emilia School of Medicine, 41100 Modena, Italy
4. Department of Medicine and Sciences of Aging, University “G. d'Annunzio”, 66100 Chieti, Italy