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Number of Articles by Topic.
| Topic | Number of Articles |
|---|---|
| Age Restrictions | 24 |
| Age Restrictions: Give | 2 |
| Age Restrictions: Sell | 10 |
| Youth DTM Exposure | 18 |
| Youth DTM Exposure and Tobacco Use | 18 |
| Youth DTM Engagement | 8 |
| Youth DTM Engagement and Tobacco Use | 8 |
Note. The numbers do not add to 47 because some articles addressed only one topic, while other studies addressed multiple topics (e.g., measured youth DTM exposure and youth tobacco use).
