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| Stage | Nº studies examined | Nº studies excluded | Reason for exclusion |
|---|---|---|---|
| Articles obtained from search terms | 2421 | 967 | Irrelevant topic |
| Abstracts retrieved for evaluation | 454 | 157 | Did not meet criteria |
| Articles attempted to find full text for | 297 | 83 | Full text not accessible |
| Full text obtained for detailed evaluation | 214 | 185 | Did not meet criteria |
| Articles considered for analysis | 29 | 5 | Used standardised patients |
| Articles finally included | 24 |
