1 Subjects: “...Comparative Effectiveness Research...”

2 Subjects: “...Comparative Effectiveness Research...”

3 “... SOURCES: We conducted comprehensive searches in nine electronic databases. We also hand searched reference...”

4 “... SOURCES: We conducted comprehensive searches in nine electronic databases. We also hand searched reference...”

5 “...Final research report...”

6 “...RESULTS: The information retrieval identified 4 RCTs as relevant for the research question...”

7 “...RESULTS: The information retrieval identified 4 RCTs as relevant for the research question...”

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11 “... test or downstream testing. Assessment of harms was limited. Future research using more refined...”