- World Health Organizationwww.who.int
- United States Department of Laborwww.osha.gov
- U.S. Food & Drug Administrationwww.fda.gov
- Centers for Disease Control and Preventionwww.cdc.gov
- Georgia Department of Public Healthwww.dph.georgia.gov
- Mayo Clinicwww.mayoclinic.org
