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.
Mulder L, van Rossum M, Horst G, Limburg P, de Graeff-Meeder ER, Kuis W, Kallenberg C.Mulder L, et al.J Rheumatol. 1997 Mar;24(3):568-75.J Rheumatol. 1997.PMID: 9058667
ter Borg EJ, Horst G, Hummel E, Jaarsma D, Limburg PC, Kallenberg CG.ter Borg EJ, et al. Among authors: kallenberg cg.Arthritis Rheum. 1988 Dec;31(12):1563-7. doi: 10.1002/art.1780311215.Arthritis Rheum. 1988.PMID: 2461714