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Electronic databases
| Database | Number |
|---|---|
| Academic Search Complete | 591 |
| MEDLINE Complete | 357 |
| CINAHL Plus with full text | 208 |
| Psychology and Behavioural Sciences Collection | 163 |
| Cochrane Central Register of Controlled Trials | 66 |
| Cochrane Database of Systematic Reviews | 3 |
| Web of Science | 218 |
| Scopus | 400 |
| PubMed | 154 |
| All | 2160 |
| Narrow by Langue | English |
