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.
Svensson M, Norén L.Svensson M, et al. Among authors: noren l.Vardfacket. 1991 Sep 26;15(16):V-VIII.Vardfacket. 1991.PMID: 1812661Swedish.No abstract available.