Human Molecular Genetics 2010 19:24; pp. 4790–4798; doi: 10.1093/hmg/ddq409

An error was made with the first author of this paper. The single dagger (linked to the footnote “These authors have contributed equally to the study”) was missing after the author name. It is correctly shown above and has also been corrected online. The publisher apologises for this error.

Author notes

These authors have contributed equally to the study.