1 Department of Pediatric Neurology, University Children's Hospital, Zürich, Switzerland.
2 Division of Pediatric Neurology, Children's Hospital, Lucerne, Switzerland.
3 Pediatric Neurology and Neurorehabilitation Unit, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
4 Division of Pediatric Neurology, Children's Hospital, Winterthur, Switzerland.
5 Division of Pediatric Radiology and Pediatric Neuroradiology, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States.
6 Department of Neurogenetics, Kennedy Krieger Institute, Baltimore, Maryland, United States.