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APA Citation
Down, I., Ellard, J., Triffitt, K., Zablotska, I., Hurley, M., Brown, G., Bradley, J., & Prestage, G. (2017). high-risk sexual behaviours among gay and bisexual men: comparing event-level casual sex encounters among seroconverters and non-seroconverters. Sexually transmitted infections, 93, 327–331. http://access.bl.uk/ark:/81055/vdc_100135150097.0x000013