1. The Regional Research Unit, Region Zealand, Denmark
2. Department of Surgery, Roskilde-Koege Hospital, Koege, Denmark
3. PAVI, Knowledge Centre for Rehabilitation and Palliative Care, National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
4. Roskilde-Koege Hospital, Denmark
5. The Research Unit for General Practice and Section of General Practice Department of Public Health, University of Copenhagen, Copenhagen, Denmark