1. Swabian Children's Cancer Centre, Children's Hospital Augsburg, Augsburg, Germany
2. Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, USA
3. Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Department of Radiation Oncology, Brigham and Women's Hospital, Harvard Medical School, Boston USA
4. Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, USA
5. Department of Radiology, Boston Children's Hospital, Harvard Medical School, Boston, USA
6. Department of Pathology, Klinikum Augsburg, Augsburg, Germany
7. Department of Pediatric Pathology, University Hospital of Schleswig-Holstein, Kiel, Germany (deceased)
8. Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, USA