Despite published data observing the association of T2D locus TCF7L2 with a subset of T1D patients [24, 25], our study did not observe an association of this locus with LADA; one possibility could be that we used population-based controls, while previous studies may have used a different control strategy where the difference in the risk allele was more evident due to its under-representation in relatively disease-free controls. Here, TCF7L2 is linked to type 1 diabetes mellitus.