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Scattering of articles in journals.
| Group | Journals (n=841), n | Articles (n=4473), n | Cumulative, n (%) | Description |
| Top third | 20 | 1504 | 1504 (33.6) | Publishing 26-419 articles |
| Middle third | 113 | 1315 | 2819 (63.0) | Publishing 8-25 articles |
| Bottom third | 708 | 1654 | 4473 (100.0) | Publishing 1-7 articles |
