NEFL and amyotrophic lateral sclerosis: Analysis of sensitivity and specificity using ROC indicated that Nf‐L and Nf‐H blood proteins performed well in the separation of ALS from HC (Fig. 3A, area under the curve (AUC) = 0.93 and Fig. 3C, AUC = 0.87, p < 0.0001), while Nf‐L (but not Nf‐H) discriminated ALS‐F from ALS‐S (Fig. 3B, AUC = 0.86, p < 0.0001).