1. Center for Medical Genetics Ghent University Hospital Ghent Belgium
2. Department of Pediatrics AZ Maria Middelares Ghent Ghent Belgium
3. Department of Pediatrics, Division of Pediatric Neurology and Metabolism Ghent University Hospital Ghent Belgium
4. Pediatric Neurology Unit, Department of Pediatrics UZ Brussel Jette Belgium
5. Center for Human Genetics Katholieke Universiteit Leuven Leuven Belgium