1 Division of Pediatric Hematology-Oncology, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, Athens, Greece.
2 "Aghia Sophia" Children's Hospital ERN-PeadCan Center, Athens, Greece.
3 Hopp Children's Cancer Center, Heidelberg, Germany.
4 Department of Neuropathology, Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany.
5 CCU Neuropathology, German Consortium for Translational Cancer research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.
6 National Center for Tumor Diseases (NCT), NCT Heidelberg, a partnership between DKFZ and Heidelberg University Hospital, Heidelberg, Germany.
7 Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ) and German Consortium for Translational Cancer Research (DKTK), Heidelberg, Germany.
8 Department of Pediatric Hematology and Oncology, Heidelberg University Hospital, Heidelberg, Germany.
9 Department of Genetics, Aghios Savvas Hospital, Athens, Greece.
10 Division of Pediatric Glioma Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.
11 Department of Pediatrics and Adolescent Medicine, University Hospital Jena, Friedrich Schiller University Jena, Jena, Germany.
12 Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany.
13 Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany.
14 Division of Translational Pediatric Sarcoma Research, German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK), Heidelberg, Germany.
15 Department of Pathology, "Aghia Sophia" Children's Hospital, Athens, Greece.