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