- Correspondence to T F Runia, Department of Neurology, MS Center ErasMS, Erasmus MC University Medical Center, Kamer Ee2230 faculteit, Postbus 2040, Rotterdam 3000 CA, The Netherlands;
- Received April 21, 2014
- Revised June 26, 2014
- Accepted June 29, 2014
- First published July 21, 2014.
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