1. Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
2. Specialty School of Paediatrics, University of Bologna, Bologna, Italy
3. Medical Genetics Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
4. Laboratory of Immuno-haematology - Laboratorio Unico Metropolitano, Azienda USL, Bologna, Italy