A battery of DNA effect biomarkers to evaluate environmental exposure of Flemish adolescents, Koppen, G., Verheyen G., Maes Annemarie, Van Gorp U., Schoeters G., E. Hond Den, Staessen J., Nawrot T., Roels H. A., Vlietinck R., et al. , Journal of Applied Toxicology, Jan-05-2007, Volume 27, Issue 3, Number 246, (2007)