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APA Citation
Park, J., Marcus, J., Bernstein, K., Pandori, M., Snell, A., & Philip, S. (n.d.). p1-S2.41 Sentinel survillance for pharyngeal chlamydia and gonorrhoea among men who have sex with men - San Francisco, 2010. Sexually transmitted infections, 87, A140. http://access.bl.uk/ark:/81055/vdc_100135554788.0x00000e