1. Department of Medical Sciences; Section of Pediatrics; School of Medicine; University of Ferrara; Ferrara Italy
2. Pediatric Unit; University Hospital of Ferrara; Ferrara Italy
3. Department of Morphology; Surgery and Experimental Medicine; Section of Pathology; Oncology and Experimental Biology; School of Medicine; University of Ferrara; Ferrara Italy
4. Department of Medical Sciences; Section of Microbiology; University of Ferrara; Ferrara Italy