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.
Richards G, Smith AP.Richards G, et al. Among authors: smith ap.J Caffeine Res. 2016 Jun 1;6(2):49-63. doi: 10.1089/jcr.2015.0033.J Caffeine Res. 2016.PMID: 27274415Free PMC article.Review.
Richards G, Smith AP.Richards G, et al. Among authors: smith ap.Front Psychol. 2016 Feb 9;7:106. doi: 10.3389/fpsyg.2016.00106. eCollection 2016.Front Psychol. 2016.PMID: 26903914Free PMC article.
Richards G, Smith AP.Richards G, et al. Among authors: smith ap.Front Nutr. 2016 Nov 28;3:52. doi: 10.3389/fnut.2016.00052. eCollection 2016.Front Nutr. 2016.PMID: 27965962Free PMC article.
Mark G, Smith AP.Mark G, et al. Among authors: smith ap.Anxiety Stress Coping. 2012 Jan;25(1):63-78. doi: 10.1080/10615806.2010.548088. Epub 2011 May 24.Anxiety Stress Coping. 2012.PMID: 21271408
Mark G, Smith AP.Mark G, et al. Among authors: smith ap.Br J Health Psychol. 2012 Sep;17(3):505-21. doi: 10.1111/j.2044-8287.2011.02051.x. Epub 2011 Sep 14.Br J Health Psychol. 2012.PMID: 22107162