**Data:**
- *mIEG_outcomes.xlsx*: The full dataset containing variables and data from all studies included in the meta-analysis and in the systematic review.
- *mIEG_webplotdigitizer*: Intermediate data. Individually extracted datapoints from graphs where mean and variance was not given using (https://automeris.io/WebPlotDigitizer/)
**Analysis:**
The code for the full analysis is available on github (https://github.com/valeriabonapersona/mIEG), and linked to the OSF repository.
**Other:**
- *SYRCLE_protocol.pdf*: The study protocol in line with SYRCLE guidelines (https://www.syrcle.network/)
- *PRISMA_checklist.pdf*: PRISMA checklist