Retraction to: International Journal of Obesity https://doi.org/10.1038/ijo.2011.153, published online 09 August 2011

The Editors-in-Chief have retracted this article because the authors could not confirm approval from an ethics committee to recruit healthy donors to provide samples for use in this research.

The Publisher was unable to confirm current contact addresses for M. Maraninchi, M. Henry, F. Armougom, D. Raccah, and B. Vialettes. The remaining authors did not respond to correspondence from the Publisher about this retraction.