Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Quantile regression coefficients of 8 nutrients and their indices and toxic metals, Cd, Pb and As. The Y axis indicates the regression coefficients of a nutrient for a given toxic metal; the X axis indicates the quantile of toxic metals. Grey area indicates the 95% simultaneous confidence band for the quantile coefficient estimation; red line indicates regression coefficient = 0
