An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Bell DA, Thompson CL, Taylor J, Miller CR, Perera F, Hsieh LL, Lucier GW.Bell DA, et al. Among authors: thompson cl.Environ Health Perspect. 1992 Nov;98:113-7. doi: 10.1289/ehp.9298113.Environ Health Perspect. 1992.PMID: 1486839Free PMC article.