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.
Long NX, Ngoc NB, Phung TT, Linh DTD, Anh TN, Hung NV, Thang NT, Lan NTM, Trang VT, Thuong NH, Van Hieu N, Van Minh H.Long NX, et al. Among authors: phung tt.AIMS Public Health. 2020 Dec 11;8(1):1-14. doi: 10.3934/publichealth.2021001. eCollection 2021.AIMS Public Health. 2020.PMID: 33575403Free PMC article.