BCAR1 and type 2 diabetes mellitus: A single variant near BCAR1 with a large effect on T2D risk dominated the heterogeneity in our MR estimate; removing this variant produced a risk estimate of markedly lower heterogeneity: (OR=1.09 (95% CI: 1.05–1.14); P=5.0 × 10−5 for MR analysis; I2=15% (95% CI: 0–48%)).