Retraction to: Neuropsychopharmacology (2008) 33: 1259–1265; https://doi.org/10.1038/sj.npp.1301500, published online 11 July 2007

The Editors have retracted this article. Concerns have been raised with respect to the integrity of the data reported in Table 2. The author has not responded to a request to provide the original data files. The Editors, therefore, no longer have confidence in the conclusions presented. The author has not responded to correspondence from the Publisher about this retraction.