SLC2A1 and type 2 diabetes mellitus: The present study investigated whether SLC2A1 variants, certain 14 tag SNPs, are associated with the type 2 diabetes disease progression and with the development of type 2 diabetes mellitus leading to nephropathy and also provided the most comprehensive overview assessing for all genetic variants of SLC2A1 that have been examined in genetic association studies regarding diabetic nephropathy.