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| Database | Number of results | Excluded – not peer reviewed | Excluded – pilot studies and non primary studies | Excluded – non-English publication | Excluded – not relevant to the PICO | Total relevant papers |
|---|---|---|---|---|---|---|
| CAB Abstracts | 10 | 0 | 1 | 1 | 3 | 5 |
| PubMed | 15 | 0 | 4 | 1 | 4 | 6 |
| Web of Science | 12 | 0 | 2 | 1 | 5 | 4 |
| Total relevant papers when duplicates removed | 6 | |||||
