1. Department of Child Neurology, VU University Medical Center, Amsterdam, The Netherlands
2. Department of Radiology, VU University Medical Center, Amsterdam, The Netherlands
3. Department of Neurology, Children's Hospital Medical Center, Cincinnati, United States
4. Department of Neurology/Child Neurology, General Hospital Sint-Jan, Brugge, Belgium
5. Department of Paediatrics, Derbyshire Children's Hospital, Nottingham, United Kingdom
6. Bristol Royal Hospital for Children, Bristol, United Kingdom