1. Department of Gastrointestinal Surgery, Aalborg University Hospital, Aalborg, Denmark
2. Department of Gastrointestinal Surgery, Horsens Regional Hospital, Horsens, Denmark
3. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
4. Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmark
5. Department of Molecular Diagnostics, Aalborg University Hospital, Aalborg, Denmark
6. Unit of Clinical Biostatistics, Aalborg University Hospital, Aalborg, Denmark