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Number of articles returned by database and subsequent shortlisting.
| CINAHL PLUS | 126 |
| Medline | 48 |
| EMBASE | 31 |
| Scopus | 110 |
| Web Of Science | 39 |
| Total number of papers (accounting for duplicates) | 237 |
| Number of abstracts selected for in-depth reading | 35 |
| Number of papers excluded due to criterion i | 2 |
| Number of papers excluded due to criterion ii | 12 |
| Number of papers excluded due to criterion iii | 5 |
| Number of papers excluded due to criterion iv | 7 |
| Final number of papers | 9 |
