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.
Zimmermann M, Pitz S, Schmidtmann I, Pfeiffer N, Wasielica-Poslednik J.Zimmermann M, et al.PLoS One. 2017 Jan 9;12(1):e0169438. doi: 10.1371/journal.pone.0169438. eCollection 2017.PLoS One. 2017.PMID: 28068365Free PMC article.Clinical Trial.