Extended Data Fig. 7: Full PRISMA diagram for the current research.

Thirty-three papers (76 studies) were included in the final analysis. We excluded one outlier paper (2 studies) that passed our screening process due to its extremely low variance relative to the other studies, which skewed some of the supplemental meta-analytic results. Our primary conclusions hold regardless of whether this study is included; see SI for details. Template retrieved from http://www.prisma-statement.org/PRISMAStatement/FlowDiagram.