Correction to: European Journal of Human Genetics advance online publication, 15 January 2014; doi:10.1038/ejhg.2013.288
After the above article had been published online, it was brought to the authors' attention that Figure 1 contained an image for which the patient had not given his consent for publication. Figure 1 has therefore been replaced in this article. The authors would like to extend their sincere apologies for their error.