CDK12 and diabetes mellitus: These 6 loci were identified and replicated in the overall analysis (rs3925584, located upstream of the MPPED2 gene; rs6431731 near the DDX1 gene), in the diabetes-free sub-group (rs2453580 in an intron of the SLC47A1 gene), in the younger age stratum (rs11078903 in an intron of the CDK12 gene; rs12124078 located near the CASP9 gene), and the direction test (rs2928148, located in the INO80 gene, see Methods for details).