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.
van Hulst LT, Kievit W, van Bommel R, van Riel PL, Fraenkel L.van Hulst LT, et al.Arthritis Care Res (Hoboken). 2011 Oct;63(10):1407-14. doi: 10.1002/acr.20551.Arthritis Care Res (Hoboken). 2011.PMID: 21748861Free PMC article.
Kievit W, van Hulst L, van Riel P, Fraenkel L.Kievit W, et al.Arthritis Care Res (Hoboken). 2010 Jun;62(6):842-7. doi: 10.1002/acr.20123.Arthritis Care Res (Hoboken). 2010.PMID: 20535795Free PMC article.