1. Midlands Abdominal and Retroperitoneal Sarcoma Unit, Queen Elizabeth Hospital University Hospitals Birmingham Birmingham UK
2. Department of Medical Statistics University Hospitals Birmingham NHS Foundation Trust Birmingham UK
3. Department of Surgery, Winship Cancer Institute Emory University Hospital Atlanta GA USA
4. Department of Surgery, The Ottawa Hospital University of Ottawa Ottawa Canada
5. Department of Surgical Oncology, Mount Sinai Hospital and Princess Margaret Cancer Centre University of Toronto Toronto Canada
6. Department of Surgery Leiden University Medical Centre Leiden The Netherlands
7. Division of Breast, Endocrine and Soft Tissue Surgery, Department of Surgery, Keck School of Medicine University of Southern California Los Angeles California USA
8. Department of Surgical Oncology The Netherlands Cancer Institute Amsterdam the Netherlands
9. Department of Surgical Oncology Institute of Oncology Ljubljana Slovenia
10. Department of Surgical Oncology Candiolo Cancer Institute Candiolo Italy
11. Department of Surgical Oncology Jackson Memorial Hospital Miami USA
12. Division of Cancer Surgery Peter MacCallum Cancer Centre Melbourne Australia
13. Department of Surgery Mayo Clinic Jacksonville Jacksonville Florida USA
14. Department of Surgery Sant Pau Hospital Barcelona Spain
15. Department of Surgery Patel Hospital Karachi Pakistan
16. Department of Surgery Fondazione IRCSS Istituto Nazionale dei Tumori Milan Italy