Social Class / Blood sampling / Heavy Metal / Basque country / Chromium / Multiple Linear Regression / Heavy Traffic / Public health systems and services research / Chi Square Test / General Population / Multiple Linear Regression / Heavy Traffic / Public health systems and services research / Chi Square Test / General Population
Social Class / Blood sampling / Heavy Metal / Basque country / Chromium / Multiple Linear Regression / Heavy Traffic / Public health systems and services research / Chi Square Test / General Population / Multiple Linear Regression / Heavy Traffic / Public health systems and services research / Chi Square Test / General Population