- Correspondence to Dr Jens Minnerup, Universitätsklinikum Münster, Klinik und Poliklinik für Neurologie, Albert-Schweitzer-Straße 33, 48149 Münster, Germany;
- Received 3 May 2009
- Revised 4 July 2009
- Accepted 21 July 2009
- Published online 9 February 2010.
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