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.
Longstreth WT Jr, Koepsell TD, Ton TG, Hendrickson AF, van Belle G.Longstreth WT Jr, et al. Among authors: koepsell td.Sleep. 2007 Jan;30(1):13-26. doi: 10.1093/sleep/30.1.13.Sleep. 2007.PMID: 17310860Review.
Longstreth WT Jr, Phillips LE, Drangsholt M, Koepsell TD, Custer BS, Gehrels JA, van Belle G.Longstreth WT Jr, et al. Among authors: koepsell td.Cancer. 2004 Mar 1;100(5):1026-34. doi: 10.1002/cncr.20036.Cancer. 2004.PMID: 14983499Free article.