Darling, John L1; Thomas, David GT1
1University Department of Neurosurgery, Institute of Neurology, University College London, National Hospital for Neurology and Neurosurgery, London WC1N 3BG, UK.
Correspondence to JL Darling, University Department of Neurosurgery, Institute of Neurology, University College London, National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, UK. Tel: (+44) 20 7837 3611; Fax: (+44) 20 7278 7894; e-mail: [email protected]
This study was supported in part by grants from the Cancer Research Campaign and the Brain Research Trust, London.
(Received 16 July 2001; revised form accepted 31 July 2001)