Table 1.
Electronic databases searched and number of results.
| Database | Papers identified |
|---|---|
| Embase (1947—February 2020) | 434 |
| MEDLINE (1966—February 2020) | 279 |
| PsycINFO (1967—February 2020) | 383 |
| CENTRAL (no inception date—February 2020) | 932 |
| Total | 2028 |
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