Table 1 General characteristics of the included studies
| Variable | Categories | N (%) |
|---|---|---|
| Affiliation of the first author | Medical/Clinical | 22 (73) |
| Non-medical* | 8 (27) | |
| Where journal published | International | 11 (37) |
| Regional | 2 (7) | |
| National | 17 (57) | |
| Type of journal | Medical | 23 (77) |
| Non-medical** | 7 (23) | |
| Language published | English | 13 (43) |
| Persian | 17 (57) | |
| Geographical location | National | 5 (17) |
| Sub-national | 25 (83) |