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The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
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The https:// ensures that you are connecting to the
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Verheijden MW, Jans MP, Hildebrandt VH, Hopman-Rock M.Verheijden MW, et al.J Med Internet Res. 2007 Jan 22;9(1):e1. doi: 10.2196/jmir.9.1.e1.J Med Internet Res. 2007.PMID: 17478410Free PMC article.