1. PEDEGO Research Unit; University of Oulu; Oulu Finland
2. Medical Research Center; University of Oulu, Oulu University Hospital; Oulu Finland
3. Biocenter Oulu; University of Oulu; Oulu Finland
4. Department of Pathology; Lapland Central Hospital; Rovaniemi Finland
5. Northern Finland Laboratory Centre Nordlab and Medical Research Centre; Oulu University Hospital and University of Oulu; Oulu Finland
6. Department of Clinical Genetics; Oulu University Hospital; Oulu Finland
7. Department of Children and Adolescents, Division of Pediatric Neurology; Oulu University Hospital; Oulu Finland
8. Department of Human Genetics; McGill University; Montreal Canada