A recent GWAS analysis on DKD, involving large T2DM and T1DM cohorts and taking into account eight complementary dichotomous and quantitative DKD phenotypes, identified a novel loci (near GABRR1, rs9942471) specifically associated with microalbuminuria in European T2DM case subjects only, with no signal in Asian diabetic subjects or in those with T1DM irrespective of ethnical origin [184]. Here, GABRR1 is linked to type 1 diabetes mellitus.