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Average residual tensile strain versus age in the dura mater of immature and mature rats. The average residual strain (ϵAVG) in the immature rats (postnatal age 2–26 days) exhibited a weak but statistically significant linear decrease with age (, r2=0.1827, p=0.0117). There are seven rats in the mature group. The exact age of each mature rat was unknown, but all were between postnatal age 95 and 105 days. Note that there is a discontinuity on the x-axis (age).
