- Correspondence to Dr Frank Hanisch, Department of Neurology, University Hospital Halle (Saale) Ernst-Grube-Str. 40, Halle (Saale) D-06120, Germany;
- Received September 17, 2013
- Revised June 24, 2014
- Accepted July 23, 2014
- First published August 20, 2014.
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