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.
Kjellin A, Felländer-Tsai L, Wredmark T, Larsson J.Kjellin A, et al.Lakartidningen. 2002 Jan 17;99(3):207.Lakartidningen. 2002.PMID: 11838081Swedish.No abstract available.