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.
Chin A Paw MJ, Singh AS, Brug J, van Mechelen W.Chin A Paw MJ, et al. Among authors: brug j.Int J Behav Nutr Phys Act. 2008 Aug 11;5:41. doi: 10.1186/1479-5868-5-41.Int J Behav Nutr Phys Act. 2008.PMID: 18694483Free PMC article.
Singh AS, Chin A Paw MJ, Kremers SP, Visscher TL, Brug J, van Mechelen W.Singh AS, et al. Among authors: brug j.BMC Public Health. 2006 Dec 16;6:304. doi: 10.1186/1471-2458-6-304.BMC Public Health. 2006.PMID: 17173701Free PMC article.