Correction to: European Journal of Human Genetics (2011) 19, 10–17; 10.1038/ejhg.2010.135; published online 25 August 2010

Since the publication of this article, the authors have noticed that the DNA sequence of both the PCR primers in the section ‘Methylation analysis’ in Materials and Methods is incorrect. They should read:

5′-TTGAGTGTATTTTTGTAGAAATGG-3′ and reverse 5′-CCCTCTCTCTTCAAATAACCT-3′.

The publishers would like to apologise for their error.