- Correspondence to Dr Krista Kuitwaard, Department of Neurology, Erasmus MC, University Medical Center Rotterdam, Room Ee-2230, P.O. Box 2040, Rotterdam 3000 CA, The Netherlands;
- Received November 26, 2012
- Revised February 14, 2013
- Accepted March 3, 2013
- First published March 28, 2013.
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