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| Author | Study design | Intervention | Results | Notes |
| Vachhani 2013 | ITS | Implementation of the Universal Protocol |
Change in level in percentage points (pp): ‐0.078 pp; (95% CI ‐0.176 pp to 0.02 pp); SE: 0.042; P value = 0.103 Change in slope: 0.031; (95% CI 0.004 to 0.058); SE: 0.012; P value < 0.05 |
Data re‐analysed |
