DDAH2 and type 2 diabetes mellitus: One variant (rs9267551) in the DDAH2 gene was nominally associated with type 2 diabetes (P = 3×10−5), although this association did not reach genome-wide significance (P<5×10−8), with the G diabetogenic risk allele conferring an odds ratio (OR) of 1.12 (95% CI 1.06–1.19) (Andrew Morris and Mark McCarthy personal communication for the DIAGRAM+).