CR1 and Alzheimer disease: Second, we identified that CR1 gene expression in the basal ganglia, hippocampus, and oligodenocytes are likely causal for AD, A\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{upgreek}\usepackage{mathrsfs}\setlength{\oddsidemargin}{-69pt}\begin{document}$\beta $\end{document}42, and pTau levels in CSF, with positive and negative directions of causal effects, respectively.