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.
Graff-Iversen S, Gjesdal K, Jugessur A, Myrstad M, Nystad W, Selmer R, Thelle DS.Graff-Iversen S, et al.Tidsskr Nor Laegeforen. 2012 Feb 7;132(3):295-9. doi: 10.4045/tidsskr.11.0567.Tidsskr Nor Laegeforen. 2012.PMID: 22314739Free article.English, Norwegian.
Graff-Iversen S, Skurtveit S, Nybø A, Ross GB.Graff-Iversen S, et al.Tidsskr Nor Laegeforen. 2001 Sep 20;121(22):2584-8.Tidsskr Nor Laegeforen. 2001.PMID: 11668753Free article.Norwegian.