CCL19 and dementia: Of the eight proteins associated with dementia, TGF‐alpha was also associated with lower EF domain scores in the ε4 stratum (FDR = 0.04) and full sample (FDR = 0.01), and CCL19 was also associated with lower VIS domain scores in the ε2 stratum (FDR = 0.01); all other proteins were not associated with any cognitive domain score in ε4 or any other stratum (all FDR > 0.1).