Karolinska Institutet - Childhood Cancer Research Unit, Harvard University - Harvard Stem Cell Institute, University of Gothenburg, University of Gothenburg, Karolinska Institutet, Karolinska Institutet, affiliation not provided to SSRN, University of Cologne, University of Cologne - Center for Molecular Medicine Cologne (CMMC), University of Gothenburg, Karolinska Institutet, University of Gothenburg, University of Gothenburg - Department of Laboratory Medicine, Karolinska Institutet, Princess Maxima Center for Pediatric Oncology, affiliation not provided to SSRN, Princess Maxima Center for Pediatric Oncology, Karolinska Institutet, Princess Maxima Center for Pediatric Oncology, Princess Maxima Center for Pediatric Oncology, University of Cologne - Center for Molecular Medicine Cologne (CMMC), Harvard University - Department of Stem Cell and Regenerative Biology, affiliation not provided to SSRN, University of Gothenburg and Karolinska Institutet