- Correspondence to: Dr Hugues Duffau Service de Neurochirurgie, Hôpital de la Salpêtrière, 47–83 Bd de l’hôpital, 75651 Paris Cedex 13, France;
- Received 18 May 2004
- Accepted 10 October 2004
- Revised 3 September 2004
- Published online 16 June 2005.
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