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.
Ostensen M, Husby G.Ostensen M, et al. Among authors: husby g.Rheum Dis Clin North Am. 1989 May;15(2):241-54.Rheum Dis Clin North Am. 1989.PMID: 2657890Review.