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Summary of reasons for exclusion from systematic review (n=288).
| Reason for exclusion | n |
| Not original research: reviews, editorials, and commentaries | 59 |
| Methods or technical papers | 7 |
| Guidelines | 4 |
| Papers not specific to adolescent or young adult ages | 100 |
| Papers not clearly involving online social media | 30 |
| Papers not relating to human health | 1 |
| Total number excluded | 201 |
