Correction to: Neuropsychopharmacology advance online publication, 23 July 2008; doi:10.1038/npp.2008.108

In this article, on page 1, right column, second paragraph, line 11, an error occurred in the sentence beginning with ‘In human lymphoblast cell lines, average overall DNA….’ The sentence should read as follows: ‘In human lymphoblast cell lines, average overall DNA methylation at the monoamine oxidase A gene promoter was found….’