SOD1 and amyotrophic lateral sclerosis: Around 5–10% of ALS forms are familial and four genes account for about two‐thirds of cases: chromosome 9 open reading frame 72 (C9orf72), superoxide dismutase 1 (SOD1), TAR DNA binding protein (TARDBP, encoding for TAR DNA‐binding protein‐43, TDP‐43), and fused in sarcoma (FUS) [5].