highly significantp = 6.5 × 10 −30
The strongest signal according to the PP4/PP3 was identified for rs2453555 at 9p21.2 (PP4/PP3 = 82.5), which was highly significantly associated with ALS risk (GWAS p = 6.5 × 10 −30 ), and at the same time served as a highly significant eQTL of C9orf72 in the pituitary gland (eQTL p = 4.4 × 10 −12 ), strongly suggesting a causal relationship ( Figure 3B ).