1. Department of Pediatrics “Lalla Seràgnoli”, Hematology-Oncology Unit, University of Bologna, Bologna, Italy
2. Interdepartmental Centre of Cancer Research “G. Prodi”, University of Bologna, Bologna, Italy
3. Current address: Stem Cell Group, University College London Cancer Institute, University College London, London, United Kingdom
4. Department of Pediatric Hematology Oncology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
5. Department of Woman and Child Health, Laboratory of Hematology-Oncology, University of Padova, Padova, Italy
6. Department of Pediatric Hematology-Oncology, IRCCS Ospedale Bambino Gesù, Rome, Italy
7. University of Pavia, Pavia, Italy