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.
Parkes A, Henderson M, Wight D.Parkes A, et al.J Fam Plann Reprod Health Care. 2005 Oct;31(4):271-80. doi: 10.1783/jfp.31.2.271.J Fam Plann Reprod Health Care. 2005.PMID: 16274548Free article.
Henderson M, Wight D, Raab GM, Abraham C, Parkes A, Scott S, Hart G.Henderson M, et al. Among authors: parkes a.BMJ. 2007 Jan 20;334(7585):133. doi: 10.1136/bmj.39014.503692.55. Epub 2006 Nov 21.BMJ. 2007.PMID: 17118950Free PMC article.Clinical Trial.
Wight D, Parkes A, Strange V, Allen E, Bonell C, Henderson M.Wight D, et al. Among authors: parkes a.Perspect Sex Reprod Health. 2008 Dec;40(4):226-37. doi: 10.1363/4022608.Perspect Sex Reprod Health. 2008.PMID: 19067936
Parkes A, Wight D, Henderson M, West P.Parkes A, et al.J Adolesc. 2010 Oct;33(5):741-54. doi: 10.1016/j.adolescence.2009.10.006. Epub 2009 Nov 7.J Adolesc. 2010.PMID: 19897236Free PMC article.Clinical Trial.
Parkes A, Strange V, Wight D, Bonell C, Copas A, Henderson M, Buston K, Stephenson J, Johnson A, Allen E, Hart G.Parkes A, et al.J Adolesc Health. 2011 Jan;48(1):27-35. doi: 10.1016/j.jadohealth.2010.05.010. Epub 2010 Aug 21.J Adolesc Health. 2011.PMID: 21185521Free PMC article.