1. Department of Radiology; University Medical Centre Utrecht-Princess Maxima Centre for Paediatric Oncology; Utrecht the Netherlands
2. Department of Paediatric Radiology; Hospital Materno-Infantil Vall d'Hebron; Barcelona Spain
3. Department of Radiology; VU University Medical Centre; Amsterdam the Netherlands
4. Department of Radiology; IRCCS Giannina Gaslini Hospital; Genoa Italy
5. Department of Paediatric Oncology/Haematology; Erasmus MC University Medical Centre-Sophia's Children's Hospital; Rotterdam the Netherlands
6. Department of Diagnostic Imaging and Intervention; Oslo University Hospital; Rikshospitalet; Oslo Norway
7. Department of Paediatric Radiology; Institute for Maternal and Child Health; IRCCS Burlo Garofolo; Trieste Italy
8. Princess Maxima Centre for Paediatric Oncology; Utrecht the Netherlands