1. Department of Neurosurgery, Neuromed Campus, Kepler University Hospital, Johannes Kepler University, Linz, Austria
2. Institute of Cancer Research and Comprehensive Cancer Center, Department of Medicine I, Medical University Vienna, Vienna, Austria
3. Department of Pediatrics and Adolescent Medicine, Medical University Vienna, Vienna, Austria
4. Department of Internal Medicine, Neuromed Campus, Kepler University Hospital, Linz, Austria
5. Institute of Pathology and Neuropathology, Neuromed Campus, Kepler University Hospital, Linz, Austria
6. Division of Molecular Genetic Epidemiology, German Cancer Research Center, Heidelberg, Germany
7. Laboratory of Molecular Biology and Tumorcytogenetics, Ordensklinikum Linz, Linz, Austria