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Hearn, Lauren E.; Whitehead, Nicole Ennis; Dunne, Eugene M.; Latimer, William W. . (2015). Correlates of <i>Trichomonas vaginalis</i> Among Middle Age and Older Adults Who Use Drugs. Substance Use & Misuse, 50(12), 1501–1509. doi:10.3109/10826084.2015.1018546 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research