1. Department of Pediatric Neurology, Beatrix Children’s Hospital, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands
2. Expertise Center Movement Disorders Groningen, University Medical Center Groningen (UMCG), 9713 GZ Groningen, The Netherlands
3. Department of Genetics, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands