Correction to: European Journal of Human Genetics advance online publication 28 January 2015; doi:10.1038/ejhg.2014.279

Post publication, the authors of this paper realised that Olaf R Mook, Department of Human Genetics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands, was not included in the list of authors. This has now been rectified and the corrected article appears in this issue.

The authors would like to apologise for this omission.