1. Centers for Disease Control and Prevention. Second national report on human exposure to environmental chemicals. In Second national report on human exposure to environmental chemicals 2003. NCEH.
2. Centers for Disease Control and Prevention. Third national report on human exposure to environmental chemicals: executive summary. In Third national report on human exposure to environmental chemicals: executive summary 2005. NCEH.
3. ATSDR U. Toxicological profile for mercury (update) Atlanta, GA: US Agency for Toxic Substances and Disease Registry. 1999.
4. ATSDR U. Toxicological profile for arsenic. Agency for Toxic Substances and Disease Registry, Division of Toxicology, Atlanta, GA. 2007a.
5. ATSDR U. Toxicological profile for lead. US Department of Health and Human Services 2007b; 1:582.