Pondaag Willem, Malessy Martijn J A, van Dijk J Gert, Thomeer Ralph T W M
Department of Neurosurgery, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, the Netherlands.
Dev Med Child Neurol. 2004 Feb;46(2):138-44. doi: 10.1017/s0012162204000258.