HIV incidence and factors associated with HIV acquisition among injection drug users in St Petersburg, Russia. Commentary von KOZLLOV, Andrei P, SHABOLTAS, Alla V, RYDER, Robert W, HOFFMAN, Irving F, LUO, Robert F, COFRANCESCO, Joseph, TOUSSOVA, Olga V, VEREVOCHKIN, Sergei V, MASSE, Benoit R, PERDUE, Tom, BEAUCHAMP, Geetha, SHELDON, Wayne, MILLER, William C, HEIMER, Rober

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