1. ; Department of Pediatrics; University of Leuven; Belgium
2. Department of Pediatrics; Parc Taulí Hospitals; Sabadell Spain
3. ; Department of Pediatrics; University of Catania; Italy
4. ; Wilhelmina Children's Hospital; Utrecht The Netherlands
5. ; Department of Neurology; Ignatius Hospital Breda; The Netherlands
6. ; University Children's Hospital; Marburg Germany
7. ; Department of Pediatrics; University of Heidelberg; Germany
8. ; University Hospital Sant Joan de Déu; Barcelona Spain
9. ; Department of Pediatrics; Hôpital des Enfants Malades; Paris France
10. Vestische Kinderklinik; Datteln Germany
11. ; Institutes of Neurology, Pediatrics and Radiology; University Hospital Nijmegen; The Netherlands
12. Laboratory of Physiological Chemistry; ICP and University of Louvain; Belgium