1. Department of Paediatric Neurology Turku University Hospital Turku Finland
2. Departments of Paediatrics and Paediatric Neurology University of Turku Turku Finland
3. Department of Radiology Turku University Hospital Turku Finland
4. Department of Paediatrics and Adolescent Medicine Turku University Hospital Turku Finland
5. Department of Biostatistics University of Turku Turku Finland