MUL1 and amyotrophic lateral sclerosis: PROT‐a‐1969 (MUL1) and PROT‐a‐1970 (MUL1) were significantly associated with ALS, which was validated using the ebi‐a‐GCST90013429 dataset (IVW: OR = 0.9028, 95% CI 0.8459–0.9636, p = 0.0021; IVW: OR = 0.9206, 95% CI 0.8621–0.9831, p = 0.0135) (Figure 6).