BRD2 and acute lymphoblastic leukemia: Mendelian randomisation (MR) analyses indicated a genetically causal protective effect of FSH on risk of F-ALL (OR (95% CI)=0.776 (0.678–0.888), P=2.15E-04) and F-EXCL (0.716 (0.604–0.850), P=1.26E-04) (Supp.