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Intervention/study location and duration of intervention
| Article | Country (location) | Duration of intervention |
|---|---|---|
| Wohl et al. [30] | USA (Los Angeles) | 2 years |
| Davila et al. [28] | USA (Texas) |
Decentralised era: 2 years Centralised area: 3 years Enhanced youth services: 10 years |
| Ruria et al. [29] | Kenya (Homa Bay) | 6 months |
| Graves et al. [32] | Uganda | 6 months |
| Bhana et al. [27] | South Africa (KwaZulu-Natal) | 3 months |
| Willis et al. [31] | Zimbabwe (Gokwe south district) | 12 months |
