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.
Blackwell T, Redline S, Ancoli-Israel S, Schneider JL, Surovec S, Johnson NL, Cauley JA, Stone KL; Study of Osteoporotic Fractures Research Group.Blackwell T, et al. Among authors: johnson nl.Sleep. 2008 Feb;31(2):283-91. doi: 10.1093/sleep/31.2.283.Sleep. 2008.PMID: 18274276Free PMC article.
Blackwell T, Yaffe K, Ancoli-Israel S, Redline S, Ensrud KE, Stefanick ML, Laffan A, Stone KL; Osteoporotic Fractures in Men (MrOS) Study Group.Blackwell T, et al.Sleep. 2011 Oct 1;34(10):1347-56. doi: 10.5665/SLEEP.1276.Sleep. 2011.PMID: 21966066Free PMC article.
Moore M, Kirchner HL, Drotar D, Johnson N, Rosen C, Redline S.Moore M, et al.Sleep Med. 2011 Mar;12(3):239-45. doi: 10.1016/j.sleep.2010.07.020.Sleep Med. 2011.PMID: 21316300Free PMC article.