FTO and type 2 diabetes mellitus: Type 2 diabetes was associated with TCF7L2 (RRpooled 1.46, 95% CI, 1.35-1.59) and FTO (RRpooled 1.15, 95% CI 1.06-1.26) but not with HLA (RRpooled 0.94, 95% CI, 0.86-1.02).