Process for choosing co-authors, as expressed by the 28 principal investigators who participated in writing the articles
| Number | % | |
|---|---|---|
| Choice of co-authors | ||
| Solely by the main author | 6 | 21 |
| After consultation with co-authors | 5 | 18 |
| On request of co-authors | 1 | 4 |
| Another way | 16 | 57 |
| Use of criteria | ||
| Yes | 25 | 89 |
| No | 3 | 11 |
| Use of one of the ICMJE criteria | ||
| Yes | 4 | 14 |
| No | 24 | 86 |
| Intervention of co-authors | ||
| Yes | 20 | 71 |
| No | 8 | 29 |
| Order of co-authors | ||
| Solely by the main author | 5 | 18 |
| After consultation with co-authors | 5 | 18 |
| On request of co-author | 0 | 0 |
| Another way | 18 | 64 |