1. Paediatric Oncology and Haematology “Lalla Seràgnoli”; University of Bologna; Bologna Italy
2. Giorgio Prodi Cancer Research Centre; University of Bologna; Bologna Italy
3. Department of Paediatric Haematology; University of Padova; Padova Italy
4. Department of Haematology; Catholic University Medical School; Roma Italy
5. Department of Paediatric Haematology-Oncology; IRCCS Ospedale Bambino Gesù; University of Pavia; Rome Italy