Correction to: European Journal of Human Genetics 19, 1074–1081; doi: 10.1038/ejhg.2011.86; published online 8 June 2011

It has come to the authors’ attention that a reference was omitted from the above article under the Results subsection, Protein Analysis (page 7), where, at the end of this section, after the words ‘bladeVII of the mutant protein’, there should be a reference to:

Kiser PD, Golczak M, Lodowski DT, Chance MR, Palczewski K: Crystal structure of native RPE65, the retinoid isomerase of the visual cycle. Proc Natl Acad Sci USA 2009; 106: 17325–17330.