- Correspondence to Professor Philippe Couratier, Institut de NeuroEpidémiologie et Neurologie Tropicale (EA 3174), Faculté de Médecine, 2 rue du Docteur Marcland, 87025 Limoges, France;
- Received March 7, 2010
- Revised August 23, 2010
- Accepted September 20, 2010
- First published November 19, 2010.
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