B2M and diffuse large B-cell lymphoma: In FinnGen, β2M was found to be associated with an increased risk of DLBCL (OR: 2.098; 95% CI: 1.358-3.242; P = 8.28 × 10−4; FDR = 4.14 × 10−3), HL (OR: 1.581; 95% CI: 1.167-2.142; P = 3.13 × 10−3; FDR = 5.22 × 10−3), and FL (OR: 2.113; 95% CI: 1.292-3.455; P = 2.90 × 10−3; FDR = 5.22 × 10−3).