- Correspondence to Dr W-Ludo van der Pol, Brain Center Rudolf Magnus, Department of Neurology and Neurosurgery Medical Center Utrecht, Department of Neurology G 03.228, Heidelberglaan 100, Utrecht 3508 GA, The Netherlands;
- Received June 29, 2013
- Revised October 21, 2013
- Accepted November 3, 2013
- First published December 11, 2013.
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