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.
Virkki A, Polo O, Saaresranta T, Laapotti-Salo A, Gyllenberg M, Aittokallio T.Virkki A, et al. Among authors: aittokallio t.Artif Intell Med. 2008 Jan;42(1):55-65. doi: 10.1016/j.artmed.2007.09.001. Epub 2007 Nov 5.Artif Intell Med. 2008.PMID: 17981017
Virkki A, Polo O, Gyllenberg M, Aittokallio T.Virkki A, et al. Among authors: aittokallio t.J Theor Biol. 2007 Dec 21;249(4):737-48. doi: 10.1016/j.jtbi.2007.09.010. Epub 2007 Sep 15.J Theor Biol. 2007.PMID: 17936799
Aittokallio T, Virkki A, Polo O.Aittokallio T, et al.Sleep Med Rev. 2009 Oct;13(5):333-43. doi: 10.1016/j.smrv.2008.09.008. Epub 2009 Mar 14.Sleep Med Rev. 2009.PMID: 19285884Review.
Aittokallio T, Gyllenberg M, Polo O, Toivonen J, Virkki A.Aittokallio T, et al.Bull Math Biol. 2006 Feb;68(2):315-41. doi: 10.1007/s11538-005-9059-3.Bull Math Biol. 2006.PMID: 16794933