MAPT and Alzheimer disease: To determine whether any of the MAPT haplotype‐specific AD risk SNPs influenced brain expression levels of MAPT or the “synaptic transmission” co‐expression module TCX1, which also harbors MAPT, we performed expression quantitative trait loci (eQTL) and module QTL (modQTL) analyses, respectively, as described previously.14, 32, 37, 38