1. Post-graduate School of Pediatrics, University of Florence, Florence, Italy;
2. Department of Health Sciences, University of Florence and Meyer Children’s University Hospital, Florence, Italy;
3. Department of Pediatrics, Meyer Children’s University Hospital, Florence, Italy;
4. Emergency Department, Santo Stefano Hospital, Prato, Italy;
5. Department of Intensive Care Unit, Santo Stefano Hospital, Prato, Italy;
6. Department of Pediatrics, Santo Stefano Hospital, Prato, Italy;
7. Clinical Chemistry and Microbiology Laboratory, Santo Stefano Hospital, Prato, Italy