- Correspondence to: Dr Michael von Brevern Neurologische Klinik, Charité, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany; michael.von_
- Received June 20, 2006
- Accepted October 19, 2006
- Revised October 19, 2006
- First published November 29, 2006.
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