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Following a heroin shortage, fentanyl and 3-methylfentanyl, known as “China White” and “White Persian”, have become the most widely used drugs, along with amphetamine, among injecting drug users (IDUs) in Tallinn, Estonia.In order to assess the relationships between the injection of fentanyl and amphetamine, and levels of HIV prevalence and risk behaviour, 350 current IDUs were recruited using respondent-driven...
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