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Xiaofeng Luo, Peizhen Zhao, Xiao Gong, Lei Zhang, Weiming Tang, Xia Zou, Wen Chen and Li Ling
Objective: To assess concurrent heroin use and correlates among Methadone Maintenance Treatment (MMT) clients in Guangdong Province, China. Method: Demographic and drug use data were collected with a structured questionnaire, and MMT information was obta...
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