1. Department of Oncology, Naestved Sygehus, Naestved, Denmark;
2. Department of Oncology, Odense University Hospital, Odense, Denmark;
3. Department of Surgery, Aarhus University Hospital, Aarhus, Denmark;
4. Institute of Pathology, Aalborg University Hospital, and Department of Clinical Medicine, Aalborg University, Aalborg, Denmark;
5. Department of Gastroenterology, Rigshospitalet, Copenhagen, Denmark;
6. Department of Oncology, Finsen Centre, Rigshospitalet, Copenhagen and Unit of Survivorship, Danish Cancer Society Research Center, Copenhagen, Denmark