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.
Sanchez A, Pijoan JI, Pablo S, Mediavilla M, de Rozas RS, Lekue I, Gonzalez-Larragan S, Lantaron G, Argote J, García-Álvarez A, Latorre PM, Helfrich CD, Grandes G.Sanchez A, et al. Among authors: helfrich cd.Implement Sci. 2020 Jan 22;15(1):8. doi: 10.1186/s13012-020-0966-3.Implement Sci. 2020.PMID: 31969175Free PMC article.Clinical Trial.
Helfrich CD, Weiner BJ, McKinney MM, Minasian L.Helfrich CD, et al.Med Care Res Rev. 2007 Jun;64(3):279-303. doi: 10.1177/1077558707299887.Med Care Res Rev. 2007.PMID: 17507459