1. Academic Department of Surgery, St Bartholomew's and the Royal London School of Medicine and Dentistry, London, UK
2. Department of Colorectal Surgery, Cleveland Clinic Florida, Fort Lauderdale, Florida, USA
3. Department of Surgery, The Royal Infirmary of Edinburgh, Edinburgh, UK
4. Department of Surgery, St George's Hospital, Sydney, Australia
5. Institute of Surgical Sciences, Sahlgrenska University Hospital, Gothenburg, Sweden
6. Faculty of Surgery, University of Naples, Naples, Italy
7. Department of Surgery, Queen Elizabeth Hospital, Birmingham, UK