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.
Hrafnkelsson H, Magnusson KT, Sigurdsson EL, Johannsson E.Hrafnkelsson H, et al. Among authors: johannsson e.Scand J Prim Health Care. 2009;27(3):186-91. doi: 10.1080/02813430903155028.Scand J Prim Health Care. 2009.PMID: 19731182Free PMC article.
Bjarnadottir A, Kristjansdottir AG, Hrafnkelsson H, Johannsson E, Magnusson KT, Thorsdottir I.Bjarnadottir A, et al. Among authors: johannsson e.Public Health Nutr. 2015 Feb;18(2):208-17. doi: 10.1017/S1368980013003558. Epub 2014 Jan 22.Public Health Nutr. 2015.PMID: 24476995Free PMC article.
Hrafnkelsson H, Magnusson KT, Thorsdottir I, Johannsson E, Sigurdsson EL.Hrafnkelsson H, et al. Among authors: johannsson e.Scand J Prim Health Care. 2014 Dec;32(4):149-55. doi: 10.3109/02813432.2014.982363. Epub 2014 Nov 26.Scand J Prim Health Care. 2014.PMID: 25424464Free PMC article.Clinical Trial.