- Correspondence to: Olivier Laurent LERES, Ecole Nationale de la Santé Publique, Avenue du Professeur Léon Bernard, 35043 Rennes Cedex, France;
- Accepted October 24, 2006
- First published July 13, 2007.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.