1. Department of Pediatrics and Adolescent Medicine; Molecular Neuro-oncology Research Unit; Medical University of Vienna; Vienna Austria
2. Department of Pathology; School of Medicine; Dokuz Eylül University; Izmir Turkey
3. Division of Pediatric Neuro-Oncology; German Cancer Research Center DKFZ; Germany
4. Institute of Neurology; Medical University of Vienna; Vienna Austria
5. Department of Neurology; Neurogenetics Unit; Massachusetts General Hospital/Harvard Medical School; Boston Massachusetts