1. Department of Pediatric Oncology, Pediatric Cancer Center Barcelona Hospital Sant Joan de Déu Barcelona Spain
2. Neuro‐Oncology Unit, Pediatric Cancer Center Barcelona Hospital Sant Joan de Deu Barcelona Spain
3. Transfusion Service, Banc de Sang i Teixits Hospital Sant Joan de Déu Barcelona Spain
4. Department of Molecular Genetics Hospital Sant Joan de Déu Barcelona Spain
5. Haematology Department Hospital Clínic Barcelona Spain
6. Stem Cell Transplant Unit and Department of Hematology, Pediatric Cancer Center Barcelona Hospital Sant Joan de Déu Barcelona Spain