Correction to: Molecular Psychiatry (2009) 14, 719–727; published online 9 December 2008; doi:10.1038/mp.2008.130

After the above article was published, the authors noted that the terminology used in the above article may create confusion for some readers.

The substance of the clarification is as follows:

Throughout the article the term ‘exon 1’ was used to refer to the first coding exon of the serine racemase gene. It should be noted that the murine serine racemase gene includes two non-coding exons upstream of that which we have deleted.