1. British National Surveys of Sexual Attitudes and Lifestyles (NATSAL) survey. The accuracy of reported sensitive sexual behaviour in Britain: exploring the extent of change 1990–2000. Sex Transm Infect 2002;78(1):26–30.
2. Clinical effectiveness guideline for the management of Chlamydia trachomatis genital tract infection. Clinical Effectiveness Group (Association for Genitourinary Medicine and the Medical Society for the Study of Venereal Diseases). British Association for Sexual Health and HIV. 2002.
3. Choosing health: making healthy choices easier,2004
4. Recommended standards for sexual health services. Medical Foundation for Aids and Sexual Health,2005
5. Guidelines available on the National Electronic Library for Health. Online. Available at: http://libraries.nelh.nhs.uk/guidelinesFinder/