ERVW-1 and amyotrophic lateral sclerosis: Briefly, we observed positive correlations between the two epitopes in the ALS-ND group, as follows: HERV-K-env-su(20–38) and TDP-43(258–271) (r = 0.246, p = ns) (Figure 4A), HERV-K-env-su(20–38) and TDP-43(398–411) (r = 0.451, p = 0.018) (Figure 4C), and lastly HERV-K-env-su(20–38) and TDP-43(398–411)P (r = 0.357, p = ns) (Figure 4E).