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Coyer, Liza and Boyd, Anders and Davidovich, Udi and van Bilsen, Ward P H and Prins, Maria and Matser, Amy (2022) Increase in recreational drug use between 2008 and 2018: results from a prospective cohort study among HIV-negative men who have sex with men. Addiction, 117, (3), pp. 656-665. doi: 10.1111/add.15666.