| Date | Event | Description |
|---|---|---|
| 13 September 2021 | Amended | Typo corrected in the search methods and Appendix 3. |
| 9 September 2021 | New citation required but conclusions have not changed | Review has been updated: Ketamine and esketamine may be more efficacious than placebo at 24 hours, however evidence is of low or very low quality. |
| 9 September 2021 | New search has been performed | Thirty‐nine new trials identified. |
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