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NHANES BFR data analysis. We plot in solid lines. The top and bottom dotted lines plot the pointwise 95% confidence interval on βk(u) for each k ∈ {0, 1, 2, 3} via the use of 500 bootstrap estimates. The dashed horizontal line marks the position of zero. This figure appears in color in the electronic version of this article, and any mention of color refers to that version.
