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.
Winje BA, Mannsåker T, Langeland N, Heldal E.Winje BA, et al. Among authors: heldal e.Tidsskr Nor Laegeforen. 2008 Nov 20;128(22):2588-92.Tidsskr Nor Laegeforen. 2008.PMID: 19023372Free article.Review.Norwegian.
Heldal E, Bjartveit K, Tverdal A.Heldal E, et al.Tidsskr Nor Laegeforen. 1995 Nov 10;115(27):3390-3.Tidsskr Nor Laegeforen. 1995.PMID: 7491584Norwegian.
Bjune G, Heldal E.Bjune G, et al. Among authors: heldal e.Tidsskr Nor Laegeforen. 1994 Feb 20;114(5):578-81.Tidsskr Nor Laegeforen. 1994.PMID: 7516095Norwegian.
Dahle UR, Sandven P, Heldal E, Caugant DA.Dahle UR, et al. Among authors: heldal e.Tidsskr Nor Laegeforen. 2002 Mar 10;122(7):697-700.Tidsskr Nor Laegeforen. 2002.PMID: 11998732Free article.Norwegian.