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APA Citation
Stall, R., Wei, C., Raymond, H. F., & McFarland, W. (2011). do rates of unprotected anal intercourse among HIV-positive MSM present a risk for hepatitis C transmission?. Sexually transmitted infections, 87(5), 439–441. http://access.bl.uk/ark:/81055/vdc_100137789483.0x00000c