MAPT and early-onset autosomal dominant Alzheimer disease: As shown in Table 5, the top 3 high-frequency co-occurrence keywords were “Alzheimer’s disease,” “frontotemporal dementia,” and “amyotrophic lateral sclerosis,” followed by “frontotemporal lobar degeneration,” “dementia,” “tau,” “semantic dementia,” “mutations,” “diagnosis,” and “lobar degeneration.” The co-occurrence keywords network (Figure 8A) and the clustered network map of keywords (Figure 8B) were shown.