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.
Horn K, Swartz JA.Horn K, et al. Among authors: swartz ja.Int J Environ Res Public Health. 2019 Apr 18;16(8):1399. doi: 10.3390/ijerph16081399.Int J Environ Res Public Health. 2019.PMID: 31003429Free PMC article.