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General practice patients treated for substance use problems : a cross-national observational study in Belgium
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General practice patients treated for substance use problems: a cross-national observational study in Belgium
General practice patients treated for substance use problems: a cross-national observational study in Belgium.
General practice patients treated for substance use problems: a cross-national observational study in Belgium ...
Additional file 1: Table S1. of General practice patients treated for substance use problems: a cross-national observational study in Belgium ...