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EMBASE: inception to December 13, 2019
| Step | Search Criteria | Citations |
|---|---|---|
| 1. | ketamine.mp. or exp ketamine/ | 42871 |
| 2. | exp depression/ or depression.mp. | 720295 |
| 3. | 1 and 2 | 6555 |
| 4. | limit 3 to human | 5033 |
| 5. | limit 4 to (clinical trial or randomized controlled trial or controlled clinical trial or multicenter study or phase 1 clinical trial or phase 2 clinical trial or phase 3 clinical trial or phase 4 clinical trial) | 1040 |
