1. Paediatric Immunology Unit, Anna Meyer Children's Hospital and University of Florence, Florence, Italy
2. Department of Paediatrics, Anna Meyer Children's Hospital and University of Florence, Florence, Italy
3. Paediatric Infectious Disease Unit, Anna Meyer Children's Hospital and University of Florence, Florence, Italy
4. Paediatric Medical Unit, Anna Meyer Children's Hospital and University of Florence, Florence, Italy
5. Management Control Unit, Anna Meyer Children's Hospital and University of Florence, Florence, Italy
6. Emergency Department, Anna Meyer Children's Hospital and University of Florence, Florence, Italy