- Correspondence to: L Villard INSERM, U491, Faculté de Médecine de La Timone, 27 boulevard Jean Moulin, 13385 Marseille cedex 5, France;
- Received January 25, 2007
- Accepted February 28, 2007
- Revised February 28, 2007
- First published March 9, 2007.
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