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Subject
- Drug abuse--Epidemiology[remove]36
- Epidemiology31
- Drug abuse30
- Medication abuse11
- Opioid abuse9
- Substance abuse9
- Substance abuse--Epidemiology9
- Youth--Drug use8
- Opioids7
- Heroin6
- Heroin abuse6
- Marijuana6
- Cannabis5
- Mental health4
- Teenagers--Drug use4
- Psychotropic drugs3
- Brazilian students2
- College students--Drug use2
- Drinking of alcoholic beverages2
- HIV-positive persons2