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.
Djebbi-Simmons D, Alhejaili M, Janes M, King J, Xu W.Djebbi-Simmons D, et al.AIMS Public Health. 2020 Jul 29;7(3):574-586. doi: 10.3934/publichealth.2020046. eCollection 2020.AIMS Public Health. 2020.PMID: 32968679Free PMC article.