Errors occurred in the abstract and Table 1 of the paper by Riise et al that appeared in the May issue of theBJO (1997;81:378–385).

The first sentence in the Methods section of the abstract should read as follows:

‘The phenotypes of affected siblings in 11 Scandinavian families with two or more members who had at least three of the features: retinal dystrophy, polydactyly, obesity, hypogenitalism, and mental retardation, were compared.’

The correct version of Table 1 appears below. We apologise for these errors.