Affiliation: | Bruce Levy MBChB (hons) MSc MD FRCS is a Consultant Colorectal Surgeon at St Richard''s Hospital, Chichester, West Sussex, UK. Conflicts of interest: none declared; Mohammad Mobasheri BMedSci MBBS MRCS is a Clinical Research Fellow/Surgical Registrar at Imperial College NHS Trust, London, UK. Conflicts of interest: none declared |