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APA Citation
Benn, P. D., Rooney, G., Carder, C., Brown, M., Stevenson, S. R., Copas, A., Robinson, A. J., & Ridgway, G. L. (2007). chlamydia trachomatis and Neisseria gonorrhoeae infection and the sexual behaviour of men who have sex with men. Sexually transmitted infections, 83(2), 106–112. http://access.bl.uk/ark:/81055/vdc_100135540807.0x000008