MTNR1A and type 2 diabetes mellitus: The interaction between MTNR1A gene rs2119882 locus and CLOCK gene rs1801260 locus was associated with the risk of type 2 diabetes (RERI = 1.07, (95% CI, 0.23–1.91); AP = 0.77, (95% CI, 0.36–1.17)).