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.
Schroll M, Jónsson PV, Mor V, Berg K, Sherwood S.Schroll M, et al. Among authors: berg k.Age Ageing. 1997 Sep;26 Suppl 2:55-9. doi: 10.1093/ageing/26.suppl_2.55.Age Ageing. 1997.PMID: 9464556
Cook RJ, Berg K, Lee KA, Poss JW, Hirdes JP, Stolee P.Cook RJ, et al. Among authors: berg k.Arch Phys Med Rehabil. 2013 Jun;94(6):1038-47. doi: 10.1016/j.apmr.2012.12.024. Epub 2013 Feb 4.Arch Phys Med Rehabil. 2013.PMID: 23385108