The authors wish to retract this article owing to inadvertent overlap with an earlier, broader study (Jablonski KA, McAteer JB, de Bakker PI et al [2010] Common variants in 40 genes assessed for diabetes incidence and response to metformin and lifestyle intervention in the diabetes prevention program. Diabetes 59:2672–2681). The data presented in Tables 1 and 2 of this article had previously been published in the supplementary tables of Jablonski et al.

This retraction is intended to maintain the integrity and originality of material published in Diabetologia and the journal acknowledges the full cooperation of the authors.