| PROJECT | CENTERS / COUNTRIES | WEST EUROPE | EST EUROPE | LATIN AMERICA | NORTH AMERICA | OTHERS | TOTALS |
| MTX Pavia | 56 / 20 | 518 | 39 | 66 | 8 | 2 | 633 |
| CHAQ CHQ JIA | 32 / 32 | 2019 | 696 | 379 | 0 | 141 | 3235 |
| CHAQ CHQ Healthy | 32 / 32 | 2115 | 575 | 524 | 0 | 195 | 3409 |
| JSLE CS | 108 / 39 | 258 | 93 | 150 | 35 | 21 | 557 |
| JDM CS | 95 / 36 | 160 | 37 | 78 | 17 | 3 | 295 |
| CSA | 56 / 22 | 183 | 50 | 25 | 85 | 1 | 344 |
| Antares | 16 / 1 | 213 | 0 | 0 | 0 | 0 | 213 |
| Vasculitis | 93 / 36 | 916 | 159 | 233 | 6 | 85 | 1399 |
| MTX Withdrawal | 61 / 29 | 178 | 93 | 80 | 0 | 13 | 364 |
| JDM Trial | 53 / 20 | 86 | 12 | 34 | 6 | 0 | 138 |
| EPOCA | 119 / 49 | 5622 | 4036 | 1313 | 773 | 2175 | 13919 |
| PHARMACHILD | 84 / 31 | 5040 | 2876 | 665 | 0 | 257 | 8838 |
| ABIRISK Registry | 24 / 12 | 69 | 86 | 0 | 0 | 0 | 155 |
| MAS | 90 / 31 | 620 | 138 | 74 | 148 | 131 | 1111 |
| JIA classification | 23 / 11 | 79 | 72 | 0 | 2 | 5 | 158 |
| The STARS trial | 1 / 1 | 4 | 0 | 0 | 0 | 0 | 4 |
| TOTAL | 943 / 402 | 18080 | 8962 | 3621 | 1080 | 3029 | 34772 |