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.
Schmidt WA, Seifert A, Gromnica-Ihle E, Krause A, Natusch A.Schmidt WA, et al. Among authors: krause a.Rheumatology (Oxford). 2008 Jan;47(1):96-101. doi: 10.1093/rheumatology/kem322.Rheumatology (Oxford). 2008.PMID: 18077499