Correction to: European Journal of Human Genetics (2012) 20, 897–904; doi:10.1038/ejhg.2012.44

Since the publication of this article, the authors have noticed that they had omitted funding information, and that the Figure 2 legend needed clarification. These issues have now been rectified and the corrected article appears in this issue. The HTML and online PDF versions have also been rectified.

The authors would like to apologise for their oversight.