1. Agency for Toxic Substances and Disease Registry ATSDR (2004) Toxicological profile for Cobalt. Atlanta, GA 2004: U.S. Department of Health and Human Services, Public Health Service. https://www.atsdr.cdc.gov/toxprofiles/tp33.pdf. Accessed 11 July 2022
2. Agency for Toxic Substances and Disease Registry ATSDR (2005) Toxicological profile for Nickel. Atlanta, GA 2005: U.S. Department of Health and Human Services, Public Health Service. https://www.atsdr.cdc.gov/toxprofiles/tp15.pdf. Accessed 11 July 2022
3. Agency for Toxic Substances and Disease Registry ATSDR (2012a) Toxicological profile for Vanadium. Atlanta, GA 2012a: U.S. Department of Health and Human Services, Public Health Service. https://www.atsdr.cdc.gov/toxprofiles/tp58.pdf. Accessed 11 July 2022
4. Agency for Toxic Substances and Disease Registry ATSDR (2012b) Toxicological profile for Cadmium. Atlanta, GA 2012b: U.S. Department of Health and Human Services, Public Health Service. https://www.atsdr.cdc.gov/toxprofiles/tp5.pdf. Accessed 11 July 2022
5. Agency for Toxic Substances and Disease Registry. Toxicological ATSDR (2022) Profile for Mercury. Atlanta, GA 2022: U.S. Department of Health and Human Services, Public Health Service. https://wwwn.cdc.gov/TSP/ToxProfiles/ToxProfiles.aspx?id=115&tid=24. Accessed 11 July 2022