1. Pediatric Oncology and Hematology, Skåne University Hospital, Lund, Sweden;
2. Department of Clinical Sciences, Lund University, Lund, Sweden;
3. Institute for Cancer Outcomes and Survivorship and
4. Division of Hematology, Oncology and Bone Marrow Transplantation, University of Alabama at Birmingham, Birmingham, AL;
5. Danish Cancer Society Research Center, Copenhagen, Denmark;
6. Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark;
7. Pediatric Hematology/Oncology, City of Hope, Duarte, CA; and
8. Division of Hematology, Oncology and Transplantation, University of Minnesota, Minneapolis, MN