B2M and diffuse large B-cell lymphoma: After removing causal SNPs, significant associations remained between β2M and DLBCL (OR: 1.477; 95% CI: 1.000-2.183; P = 5.00×10−2) and between β2M and HL (OR: 2.167; 95% CI: 1.430-3.284; P = 2.67×10−4), but the association with CLL was not significant (OR: 1.262; 95% CI: 0.938-1.699; P = 0.124).