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Variations in the (a) M1, (b) Ap, (c) Aβ, and (d) Nd populations over 20 years for three values of αr = 1× (black), 10−1× (red), and 10−2× (blue) the value reported in Table 1 for the Aβ removal rate. As αr decreases, there is an increase in neuropathogenesis so that all four populations increase.
