1.

General practice patients treated for substance use problems: a cross-national observational study in Belgium ...

2.

General practice patients treated for substance use problems: a cross-national observational study in Belgium ...

3.

General practice patients treated for substance use problems: a cross-national observational study in Belgium ...

1.

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

2.

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

3.

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