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.
Metal concentrations (µg/g) in hair of schoolboys (n = 44) and girls (n = 50) living in Tarragona County (2017). Data are given as mean ± SD. Statistics: non-parametric t-test. Significant differences between both groups at: *p < 0.05, **p < 0.01 and ***p < 0.001.
