The group cooperates with both national og international researchers.
- The Swiss HIV cohort, contact Bruno Ledergerber
- Norwegian Cancer Registry
- Vanessa Didelez, University of Bristol, UK
- Torben Martinussen, Copenhagen University
- Freddie Bray, International Agency for Research on Cancer, Lyon, France
- Community Medicine Department, University of Malawi
- Johanne Sundby, University of Oslo