Hep-CAUSAL Participating Studies
| Country | Study name | Representative |
| Canada | Canadian HIV-hepatitis C Co-infection Cohort | Marina Klein, Montreal |
| South Alberta HIV cohort | John Gill, Calgary | |
| France | Aquitaine HIV cohort | Linda Wittkop, Bordeaux |
| Greece | AMACS | Giota Touloumi, Athens |
| Italy | ICONA | Antonella d’Arminio Monforte, Massimo Puoti, Milan |
| Netherlands | ATHENA | Ard van Sighem, Marc van der Valk, Amsterdam |
| Spain | CoRIS | Inmaculada Jarrin, Juan Berenguer, Madrid |
| Switzerland | Swiss HIV cohort study | Andri Rauch, Matthias Egger, Bern |
| United States | Boston Medical Center | Sara Lodi, Boston, MA |
| VACS | Amy Justice, New Haven, CT |