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.
Berger TM, Bernet V, El Alama S, Fauchère JC, Hösli I, Irion O, Kind C, Latal B, Nelle M, Pfister RE, Surbek D, Truttmann AC, Wisser J, Zimmermann R.Berger TM, et al.Swiss Med Wkly. 2011 Oct 18;141:w13280. doi: 10.4414/smw.2011.13280. eCollection 2011.Swiss Med Wkly. 2011.PMID: 22009720Free article.Review.