1. Department of Pediatric OncologyHematology and TransplantologyPoznan University of Medical Sciences Poznań Poland
2. Department of Neurology and Cerebrovascular DisordersPoznan University of Medical Sciences Poznań Poland
3. Department of NeuroradiologyPoznan University of Medical Sciences Poznań Poland
4. Department of Pediatric RadiologyPoznan University of Medical Sciences Poznań Poland