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.
Ormsby SM, Smith CA, Dahlen HG, Hay PJ, Lind JM.Ormsby SM, et al. Among authors: dahlen hg.Trials. 2016 Feb 17;17:93. doi: 10.1186/s13063-016-1204-9.Trials. 2016.PMID: 26887958Free PMC article.Clinical Trial.
Sobhgol SS, Priddis H, Smith CA, Dahlen HG.Sobhgol SS, et al. Among authors: dahlen hg.Trials. 2019 Feb 20;20(1):144. doi: 10.1186/s13063-019-3226-6.Trials. 2019.PMID: 30786930Free PMC article.