KIF1A and amyotrophic lateral sclerosis: Thirteen variants of the KIF1A gene were detected in 14 of 1,068 ALS patients, resulting in a frequency of 1.31% (14/1,068) in KIF1A. This frequency aligns with the mutation frequency observed in a research conducted in southern China (Liao et al., 2022), which revealed a frequency of 1.06% (10/941).