1. Department of Pediatric Hematology and Oncology; Kinderklinik III, Universitätsklinikum-Essen and the University of Duisburg-Essen; Essen Germany
2. Charité Universitätsmedizin, Department of Pediatrics; Division of Oncology and Hematology; Berlin Germany
3. German Consortium for Translational Cancer Research (DKTK); Heidelberg Germany
4. Translational Neuro-Oncology, West German Cancer Center (WTZ); University Hospital Essen; Essen Germany
5. Institute of Diagnostic and Interventional Radiology and Neuroradiology; Universitätsklinikum-Essen and the University of Duisburg-Essen; Essen Germany
6. Division of Pediatric Surgery, Universitätsklinikum-Essen and the University of Duisburg-Essen; Essen Germany
7. Department of Pediatric Surgery; Medical University Vienna; Vienna Austria