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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Clearance | 1 | 30 | Risk Ratio (M‐H, Random, 95% CI) | 4.5 [1.16, 17.44] |
| 2 Adverse events: syncopal attack | 1 | 30 | Risk Ratio (M‐H, Random, 95% CI) | 7.0 [0.39, 124.83] |
