PMC:7463108 / 101409-101574 JSONTXT

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{"project":"2_test","denotations":[{"id":"32876803-31420089-62958346","span":{"begin":112,"end":116},"obj":"31420089"}],"text":"ioid addiction, few studies have directly compared commonly used opiate substitution therapies (Bell and Strang 2020), especially in relation to HIV (Khalsa et al. 2"}