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Frequency of respondents by low-density lipoprotein (LDL) cholesterol allele count, with box-plots of the distribution of serum LDL cholesterol levels. Dotted lines indicate intervention levels of >130 mg/dL for borderline high levels and >160 mg/dL for high levels. The boxes indicate median and middle quartiles, whiskers include 1.5 times the inter-quartile range.
