The article types included in this study
| Article type | ||||||
|---|---|---|---|---|---|---|
| Research | Letter | Editorial | Guideline | Narrative | Review | |
| General EU | 8 | 17 | 1 | 0 | 12 | 1 |
| General NA | 8 | 5 | 4 | 1 | 5 | 2 |
| Special EU | 27 | 4 | 4 | 0 | 6 | 0 |
| Special NA | 20 | 4 | 14 | 2 | 21 | 5 |
| Total | 63 | 30 | 23 | 3 | 44 | 8 |
EU, European; NA, North American.