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.
Ravens-Sieberer U, Schulte-Markwort M, Bettge S, Barkmann C.Ravens-Sieberer U, et al. Among authors: barkmann c.Gesundheitswesen. 2002 Dec;64 Suppl 1:S88-94. doi: 10.1055/s-2002-39008.Gesundheitswesen. 2002.PMID: 12870221German.