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.
Hwang JH, Lee KH, Nam DW, Song HS.Hwang JH, et al.Medicine (Baltimore). 2021 Feb 12;100(6):e24719. doi: 10.1097/MD.0000000000024719.Medicine (Baltimore). 2021.PMID: 33578616Free PMC article.