1. Pediatric Hematology, Oncology and Stem Cell Transplant Division Department of Women's and Children's Health University Hospital of Padova Padua Italy
2. Princess Máxima Center for Pediatric Oncology Utrecht Netherlands
3. Children and Young People's Unit The Royal Marsden NHS Foundation Trust and Institute of Cancer Research Sutton UK
4. Department of Pediatric Oncology Montpellier University Hospital Centre Montpellier France
5. Department of Pediatric Immunology, Hematology and Oncology Children's Hospital of La Timone AP‐HM Marseille France
6. Department of Pediatric Hemato‐Oncology Unit IRCCS Burlo Garofolo Trieste Italy
7. Pediatric Oncology Royal Manchester Children's Hospital Manchester UK