1. Clinic of Infectious Diseases, Department of Medicine and Science of Aging, University “G. d'Annunzio” Chieti-Pescara, Chieti, Italy.
2. Unit of Immunodiagnostic and Molecular Pathology, Department of Medical, Oral, and Biotechnological Sciences, University “G. d'Annunzio” Chieti-Pescara, Chieti, Italy.
3. Department of Medicine and Health Sciences, University of Molise, Campobasso, Italy.
4. Laboratory of Biostatistics, Department of Medical, Oral, and Biotechnological Sciences, University “G. d'Annunzio” Chieti-Pescara, Chieti, Italy.
5. Division of Hygene, Epidemiology and Public Health, Department of Medicine and Science of Aging, University “G. d'Annunzio” Chieti-Pescara, Chieti, Italy.