- Correspondence to Dr Christian Dresel, Neurologische Klinik, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaninger Strasse 22, Muenchen D-81675, Germany;
- Received October 28, 2013
- Revised January 22, 2014
- Accepted February 26, 2014
- First published April 4, 2014.
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