1. Department of Laboratories Seattle Children's Hospital Seattle Washington
2. Department of Paediatric Histopathology Royal Manchester Children's Hospital Manchester Foundation Trust Manchester UK
3. Section of Pediatric Pathology Department of Pathology University Hospital Bonn Bonn Germany
4. Department of Pediatrics Duke University School of Medicine Durham North Carolina
5. Department of Pharmacology & Cancer Biology Duke University School of Medicine Durham North Carolina
6. Sarcoma Molecular Pathology Team Divisions of Molecular Pathology and Cancer Therapeutics The Institute of Cancer Research London UK
7. Division of Pediatric Hematology and Oncology Department of Pediatric and Adolescent Medicine University Medical Center Freiburg University of Freiburg Freiburg Germany
8. Klinikum Stuttgart Olgahospital, Pediatrics 5 (Oncology, Hematology, Immunology) Stuttgart Germany
9. Cancer and Blood Disorders Center Seattle Children's Hospital and Fred Hutchinson Cancer Research Center Department of Pediatrics University of Washington School of Medicine Seattle Washington
10. Dipartimento per la Salute della Donna e del Bambino University of Padova Padova Italy