Table 2.
The dates of coverage for each database.
| Database | Coverage |
|---|---|
| Scopus | 2007-2021 |
| PubMed | 2008-2021 |
| Embase | Until 2020 |
| ISI Web of Science | 2014-2021 |
| IEEE Xplore | 2007-2021 |
| Cochrane | 2017-2021 |
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