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Subject
- Teenagers4
- Health education3
- Substance abuse--Prevention3
- Youth--Substance use--Prevention3
- Teenagers--Mental health2
- Behavioral assessment of teenager1
- COVID-19 (Disease)--Social aspects1
- Child development--Research--Methodology1
- Depression, Mental1
- Electronic cigarettes1
- Research--Methodology1
- Smoking1
- Teenagers--Health and hygiene1
- Teenagers--Substance use1