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.
Pettersen HS, Belevich I, Røyset ES, Smistad E, Simpson MR, Jokitalo E, Reinertsen I, Bakke I, Pedersen A.Pettersen HS, et al. Among authors: royset es.Front Med (Lausanne). 2022 Jan 27;8:816281. doi: 10.3389/fmed.2021.816281. eCollection 2021.Front Med (Lausanne). 2022.PMID: 35155486Free PMC article.