1. Kamakwie Wesleyan Hospital, Kamakwie, Sierra Leone
2. Department of General Surgery, North Cumbria University Hospital, Carlisle, United Kingdom
3. The Lakes Medical Practice, Penrith, United Kingdom
4. Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
5. Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
6. Clinic of Surgery, Trondheim University Hospital, Trondheim, Norway
7. Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
8. Skåne University Hospital, Skåne, Sweden
9. Kiruna Hospital, Kiruna, Sweden
10. Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden
11. Mälarsjukhuset, Eskilstuna, Sweden
12. Department of Surgery, University of Ghana, Accra, Ghana
13. Department of Molecular Medicine and Surgery, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden