[1] Haukeland University Hospital,Department of Neurology
[2] Haukeland University Hospital,Department of Pediatrics
[3] Haukeland University Hospital,Department of Ophthalmology
[4] Haukeland University Hospital,Department of Genetics
[5] University of Bergen,Department of Clinical Medicine
[6] University of Bergen,Institute of Medicine
[7] University of Tromsø,Department of Clinical Medicine
[8] University Hospital of North Norway,Department of Neurology