1. Department of Gastrointestinal Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
2. Department of Oncology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
3. Hyvinkää Hospital and Hyvinkää Homecare, Hyvinkää, Finland
4. Department of Oncology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
5. Research Programs Unit, Translational Cancer Medicine Program, University of Helsinki, Helsinki, Finland
6. Statistics and Pharmacoepidemiology, Danish Cancer Society Research Center, Danish Cancer Society, Copenhagen, Denmark
7. Department of Medicine, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
8. Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
9. Department of Oncology, Tampere University Hospital and University of Tampere, Tampere, Finland