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.
Hsu HC, Lee HF, Lin MH.Hsu HC, et al.Int J Environ Res Public Health. 2021 May 22;18(11):5551. doi: 10.3390/ijerph18115551.Int J Environ Res Public Health. 2021.PMID: 34067371Free PMC article.
Hsu HC, Lin SC, Lee YH, Wu HY, Wang PY, Li JY, Lin MH.Hsu HC, et al.BMJ Open. 2021 Sep 14;11(9):e044733. doi: 10.1136/bmjopen-2020-044733.BMJ Open. 2021.PMID: 34521656Free PMC article.