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.
Lansink M, de Boer A, Dijkmans BA, Vandenbroucke JP, Hazes JM.Lansink M, et al. Among authors: vandenbroucke jp.Clin Exp Rheumatol. 1993 Mar-Apr;11(2):171-4.Clin Exp Rheumatol. 1993.PMID: 8508559
Vandenbroucke JP.Vandenbroucke JP.Br Med J (Clin Res Ed). 1988 Feb 6;296(6619):391-2. doi: 10.1136/bmj.296.6619.391.Br Med J (Clin Res Ed). 1988.PMID: 3125912Free PMC article.