Correction to: European Journal of Human Genetics (2010) 18, 872–880; doi:10.1038/ejhg.2010.23; published online 24 February 2010

Affiliation 1 appears incorrect in the paper. The correct affiliation should be Center for Medical Genetics, Ghent University Hospital, Gent, Belgium.

Geert R Mortier has two different affiliations: affiliation 1 and Department of Medical Genetics, Antwerp University Hospital, Prins Boudewijnlaan 43, B-2650 Edegem, Belgium.

The typesetters would like to apologise for this mistake.