1. Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences “Magna Graecia” University Catanzaro Italy
2. Department of Clinical Sciences and Community Health, Unit of Medical Statistics, Biometrics and Bioinformatics “Giulio A. Maccacaro”, Faculty of Medicine and Surgery University of Milan Milan Italy
3. Unit of Infectious and Tropical Diseases “Mater Domini” Teaching Hospital Catanzaro Italy
4. Unit of Clinical Microbiology, Department of Health Sciences “Magna Graecia” University Catanzaro Italy
5. Infectious Diseases Clinic, Department of Medicine University of Perugia Perugia Italy