Retraction to: Neuropsychopharmacology (2005) 30, 2006–2013; doi:; published online 13 April 2005

This article has been retracted by the editor because an investigation by the National Institutes of Health concluded that the data represented by Figures 1c, 4a and b were falsified. The authors SIR and FB agree with this retraction. The author JSR could not be reached for comment.