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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 18.1 Contamination MS2 | 1 | Risk Ratio (M‐H, Fixed, 95% CI) | Totals not selected | |
| 18.2 Contamination Ph6 | 1 | 15 | Odds Ratio (M‐H, Fixed, 95% CI) | Not estimable |
