In the European population, genetically determined GP9 is associated with a higher risk of T2D after multiple testing (IVW OR, 0.899 for T2D per 1-SD lower GP9, 95% CI = 0.845–0.957; P = 0.0008; Figs. 2, 4 and Table 3). The gene discussed is GP9; the disease is type 2 diabetes mellitus.