- Correspondence to Professor J-L Thonnard, Université catholique de Louvain, Unité de Réadaptation et de Médecine Physique (READ 5375), Tour Pasteur, 53, Av Mounier, Brussels 1200, Belgium;
- Received March 4, 2009
- Revised July 3, 2009
- Accepted August 11, 2009
- First published September 2, 2009.
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