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.
Yang YT, Mason DJ.Yang YT, et al. Among authors: mason dj.JAMA. 2021 Jan 26;325(4):345-346. doi: 10.1001/jama.2020.24509.JAMA. 2021.PMID: 33439239No abstract available.