Curtis, T. J., Rodger, A. J., Burns, F., Nardone, A., Copas, A., & Wayal, S. (2019). Patterns of sexualised recreational drug use and its association with risk behaviours and sexual health outcomes in men who have sex with men in London, UK: A comparison of cross-sectional studies conducted in 2013 and 2016. Sex Transm Infect.

Curtis, Tyrone J., Alison J. Rodger, Fiona Burns, Anthony Nardone, Andrew Copas, a Sonali Wayal. "Patterns of Sexualised Recreational Drug Use and Its Association With Risk Behaviours and Sexual Health Outcomes in Men Who Have Sex With Men in London, UK: A Comparison of Cross-sectional Studies Conducted in 2013 and 2016." Sex Transm Infect 2019.

Curtis, Tyrone J., et al. "Patterns of Sexualised Recreational Drug Use and Its Association With Risk Behaviours and Sexual Health Outcomes in Men Who Have Sex With Men in London, UK: A Comparison of Cross-sectional Studies Conducted in 2013 and 2016." Sex Transm Infect 2019.