- Correspondence to Isabelle Baldi, Laboratoire Santé Travail Environnement, EA 3672, Institut de Santé Publique d'Epidémiologie et de Développement, 146 rue Léo Saignat, 33076 Bordeaux cedex, France;
- Accepted January 17, 2010
- First published November 22, 2010.
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