TCF7L2 and diabetes mellitus: Moreover, we can also introduce TNF-α (-308G/A), NPC1(rs1805081 and rs1788799), MPO (-463G/A), TCF7L2 (rs4506565 and rs12255372), KCNJ11 (rs5219), IGF2BP2 (rs4402960 and rs1470579), VDR (rs10735810, rs731236, rs7975232, and rs1544410), TCF7L2 (rs7903146), eNOS (T786C and G894T), and ACE (C677T and I/D) polymorphisms as the candidates for the screening of the diabetes susceptibility among Iranian, Saudi Arabia, Turkish, Emirati, Syrian, Lebanese, Kuwaiti, Palestinian, Jordanian, and Bahraini populations, respectively.