1. Department of Pediatric Oncology Dana‐Farber Cancer Institute, Boston Children's Hospital, and Harvard Medical School Boston Massachusetts USA
2. Department of Radiology Boston Children's Hospital and Harvard Medical School Boston Massachusetts USA
3. Department of Pathology Boston Children's Hospital and Harvard Medical School Boston Massachusetts USA
4. Division of Haematopathology European Institute of Oncology IRCCS Milan Italy
5. Hematopathology division IRCCS Istituto Europeo di Oncologia Milan Italy