1. Children's Cancer Research Group, Leeds Institute of Cancer and Pathology, St James's University Hospital; Leeds United Kingdom
2. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo and Department of Pathology, Norwegian Radium Hospital, Oslo University Hospital; Oslo Norway
3. Department of Pathology and Laboratory Medicine; Children's Hospital Los Angeles; Los Angeles California
4. CCRI; Children's Cancer Research Institute; Vienna Austria
5. The Saban Research Institute; Children's Hospital Los Angeles; Los Angeles California
6. Princess Maxima Center for Pediatric Oncology; Utrecht The Netherlands
7. Great Ormond Street Hospital for Children NHS Trust; London United Kingdom
8. Children's Cancer Institute for Medical Research, Cancer Research Centre; Sydney New South Wales Australia
9. Department of Pediatrics; School of Medicine, University of Washington, Seattle Children's Hospital; Seattle Washington
10. Department of Pediatric Oncology and Hematology; Center for Integrated Oncology, University of Cologne; Cologne Germany