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Significance maps for ApoE4 as the covariate, with blue being P‐values of 0.1 or higher. We ran two tests, first to determine if the ApoE4 allele was linked with hippocampal atrophy in all subjects (including those with AD), and secondly in just the non‐AD subjects. None of these maps was significant after permutation testing was used for multiple comparisons correction. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]
