HIV-CAUSAL Participating Studies
| Country | Study name | Representatives |
| Canada | South Alberta HIV Cohort | John Gill, Calgary |
| Canadian Co-Infection Cohort | Marina Klein | |
| France | ANRSCO4 FHDH | Dominique Costagliola, Paris |
| ANRS1220 PRIMO & ANRSCO2 SEROCO | Laurence Meyer, Paris | |
| Aquitaine | Fabrice Bonnet, Linda Wittkop, Bordeaux | |
| Greece | AMACS | Giota Touloumi, Athens |
| Italy | ICONA | Antonella D’Arminio Monforte, Milan |
| Netherlands | ATHENA | Ard van Sighem, Marc van der Valk, Amsterdam |
| Spain | CoRIS | Inmaculada Jarrin, Julia del Amo, Madrid |
| PISCIS | Jordi Casabona, Badalona; José M. Miró, Barcelona | |
| Switzerland | Swiss HIV Cohort Study | Andri Rauch, Matthias Egger, Bern |
| United Kingdom | UK CHIC | Caroline Sabin, London |
| UK Register of Seroconverters | Kholoud Porter, Andrew Phillips, London | |
| United States | VACS | Amy Justice, Christopher Rentsch, New Haven, CT |
| Partners HIV Cohort | Virginia Triant, Boston, MA | |
| Boston Medical Center HIV Cohort | Sara Lodi, Boston, MA |