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Number of studies reviewed by method
| Primary study: quantitative | 46 |
| Primary study: qualitative | 94 |
| Primary study: mixed methods | 30 |
| Secondary analysis study: quantitative | 21 |
| Secondary analysis study: qualitative | 7 |
| Secondary analysis study: mixed methods | 3 |
| Others: systematic/scoping review | 18 |
| Others: literature review/discussion paper | 98 |
| Others: report/commentary/letter/news/blog post | 60 |
| Total | 377 |
