1. Department of Surgery and Translational Medicine; University of Florence; Florence Italy
2. Gastrointestinal Surgery Unit; Florence Careggi University Hospital; Florence Italy
3. Department of Medical Biotechnologies; University of Siena; Siena Italy
4. Department of Experimental and Clinical Medicine; University of Florence; Florence Italy
5. Microbiology and Virology Unit; Florence Careggi University Hospital; Florence Italy
6. Don Carlo Gnocchi Foundation; Florence Italy