CCL3 and Alzheimer disease: When we compared the MIP-1α level of only severe AD cases (n = 6) with matched healthy controls (n = 6) by non-parametric Wilcoxon sign ranked test, we observed significant difference between the two groups (Mean ± S.E.M. for severe AD cases: 7.30 ± 2.82, matched controls: 2.06 ± 0.2, PWilcoxon = 0.03).