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Quality assessment of the included randomized intervention studies based on the risk of bias.
| Reference | Randomization process | Deviations from intended interventions | Missing outcome data | Measurement of the outcome | Selection of the reported results | Overall risk of bias |
| Bogenschutz et al. (26) | Low | Low | Low | Some concerns | Low | Some concerns |
Classifications of quality: low, some concerns, high risk of bias.
