Affiliation: | (1) Department of Neuroradiology, University Hospital, Nottingham NG7 2UH, UK e-mail: Tim.Jaspan@easynet.co.uk Tel.: + 44-1 15–9 70 99 51 Fax: + 44-1 15-9 42 49 94, GB;(2) Department of Paediatric Neurosurgery, University Hospital, Nottingham, UK, GB |