- Correspondence to Dr M Ulla, Service de Neurologie A, Hôpital Gabriel Montpied, 58 rue Montalembert, CHU Clermont-Ferrand, F-63000 Clermont-Ferrand, France;
- Received November 5, 2009
- Revised September 6, 2010
- Accepted September 13, 2010
- First published November 3, 2010.
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