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Food and Drug Administration (FDA)

www.fda.gov

Medline Plus (U.S. National Library of Medicine and National Institutes of Health)
www.medlineplus.gov

National Institute on Deafness and Other Communication Disorders (NIDCD)

www.nidcd.nih.gov
 

National Institute for Occupational Safety and Health (NIOSH)

www.cdc.gov/niosh/

Occupational Safety and Health Administration (OSHA)

www.osha.gov

U.S. Department of Health & Human Services

www.hhs.gov/