1. Department of Pediatric Neurology; University of Turku and Turku University Hospital; Turku Finland
2. Department of Pediatrics; University of Turku and Turku University Hospital; Turku Finland
3. Department of Radiology; Turku PET Center; University of Turku and Turku University Hospital; Turku Finland
4. Department of Medicine; University of Turku; Turku Finland
5. Department of Pediatric Neurology; University of Helsinki and Helsinki University Hospital; Children's Hospital; Helsinki Finland