1. Department of Surgery Skaraborgs Sjukhus Research Centre Skaraborgs Sjukhus Skövde Skövde Sweden
2. Department of Surgery Taranaki Base Hospital New Plymouth New Zealand
3. Sahlgrenska Academy Gothenburg University Gothenburg Sweden
4. Department of Surgery Skaraborgs Sjukhus Skövde Skövde Sweden
5. Department of Clinical Sciences Lund University Lund Sweden