1. Public Health England HIV New Diagnoses, Treatment and Care in the UK: 2015 Report 2015 https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/469405/HIV_new_diagnoses_treatment_and_care_2015_report20102015.pdf
2. The National Institute for Health and Care Excellence Increasing the uptake of HIV testing to reduce undiagnosed infection and prevent transmission among men who have sex with men 2011 https://www.nice.org.uk/guidance/ph34
3. UK national guideline on safer sex advice;Clutterbuck;Int J STD AIDS,2012
4. British Association for Sexual Health BASHH recommendations for testing for sexually transmitted infections in men who have sex with men 2014 http://www.bashh.org/documents/BASHH%20Recommendations%20for%20testing%20for%20STIs%20in%20MSM%20-%20FINAL.pdf
5. Frequency of HIV testing among gay and bisexual men in the UK: implications for HIV prevention;McDaid;HIV Med,2016