1. 2nd Department of Pediatrics; Semmelweis University; Budapest Hungary
2. Department of Neuropathology; Institute of Neuropathology; University Hospital Münster; Münster Germany
3. 1st Department of Pathology and Experimental Cancer Research; Semmelweis University; Budapest Hungary
4. Department of Oncology; Children's Hospital and Swabian Children's Cancer Center; Augsburg Germany
5. Department of Human Genetics; Institute of Human Genetics; Christian-Albrechts-University Kiel; Kiel Germany
6. Department of Human Genetics; Institute of Human Genetics; University of Ulm; Ulm Germany
7. Department of Pediatric Hematology and Oncology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
8. Division of Pediatric Neurooncology; German Cancer Research Center DKFZ; Heidelberg Germany
9. German Cancer Consortium; Core Center Heidelberg; Heidelberg Germany
10. Department of Radiotherapy; National Institute of Oncology; Budapest Hungary
11. Division of Neuropathology; Faculty of Medicine; University of Debrecen; Debrecen Hungary