Correction to: European Journal of Human Genetics (2011) 19, 131–137; doi:10.1038/ejhg.2010.147; published online 22 September 2010

In this article published online on 22 September 2010, the name of one of the authors, Nigel Klein, was omitted. The authors would like to apologize for this error.

The online version of the original article can be found at 10.1038/ejhg.2010.147

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