In Section 5 we conduct an MR study estimating the effects of four biomarkers (amyloid β [Aβ] 1–42, total tau protein [Ttau], phosphorylated tau protein [Ptau], and fluoro‐D‐glucose uptake [FDG_SUVR]) on Alzheimer’s disease (AD) risk using our methods. This evidence concerns the gene MAPT and Alzheimer disease.