1. Department of Surgery Copenhagen University Hospital Herlev Herlev Denmark
2. Scientific Council of the Danish Colorectal Cancer Group Copenhagen Denmark
3. Department of Surgery Center for Surgical Science Zealand University Hospital Køge Køge Denmark
4. Department of Pathology Copenhagen University Hospital Herlev Herlev Denmark
5. Steering Committee of the Danish Colorectal Cancer Group's database Copenhagen Denmark
6. Department for Cancer and Cancer Screening Danish Clinical Registries Copenhagen Denmark
7. Department of Surgery Aarhus University Hospital Aarhus Denmark
8. Department of Surgery Aarhus University Hospital Randers Randers Denmark