Heimildir

12.1 Línulegar jöfnur

Centers for Disease Control and Prevention. (án dags.). Sótt af https://www.cdc.gov/

National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention. (án dags.). Centers for Disease Control and Prevention. Sótt af https://www.cdc.gov/nchhstp/default.htm

12.4 Spá (valfrjálst)

Centers for Disease Control and Prevention. (án dags.). Sótt af https://www.cdc.gov/

National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention. (án dags.). Centers for Disease Control and Prevention. Sótt af https://www.cdc.gov/nchhstp/default.htm

National Center for Health Statistics. (án dags.). Centers for Disease Control and Prevention. Sótt af https://www.cdc.gov/nchs/index.htm

U.S. Census Bureau. (án dags.). Sótt af http://www.census.gov/compendia/statab/cats/transportation/motor_vehicle_accidents_and_fatalities.html

12.5 Fráviksgildi

Committee on Ways and Means, U.S. House of Representatives. (án dags.). Washington, DC: U.S. Department of Health and Human Services.

Microsoft Bookshelf. (án dags.).

Physician’s Desk Reference Staff. (1990). Physician’s Desk Reference. Ohio: Medical Economics Company.

U.S. Bureau of Labor Statistics. (án dags.). Sótt af https://www.bls.gov/