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.
Barrera P, Van Ede A, Laan RF, Van Riel PL, Boerbooms AM, Van De Putte LB.Barrera P, et al. Among authors: laan rf.Ann Rheum Dis. 1994 Jul;53(7):479-80. doi: 10.1136/ard.53.7.479.Ann Rheum Dis. 1994.PMID: 7944625Free PMC article.No abstract available.