Correction to: European Journal of Human Genetics (2013) 21, 1173–1176; doi:10.1038/ejhg.2013.92; published online 22 May 2013

Since online publication, the authors have discovered that the Arg602Trp mutation is in fact c.1804C>T, and not c.1885C>T as reported in their article. This has now been amended and a revised article now appears both in this journal and online.

The authors would like to apologise for their error.