- Correspondence to: Professor Dr Jürgen Voges Department of Stereotaxy and Functional Neurosurgery, University Köln, Kerpenerstr 62, 50924 Köln, Germany;
- Received September 27, 2005
- Accepted January 25, 2006
- Revised December 22, 2005
- First published March 30, 2006.
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