*Western Sussex Hospitals NHS Trust, ST3, General Surgery, Worthing, UK
†University College London, London, UK
‡The Norfolk and Norwich Hospital, Norfolk, UK
§Brighton and Sussex University Hospitals, Brighton, UK
¶Stanford University, Stanford, CA
||N HS Tayside, Dundee, UK
**Royal London Hospital, London, UK
††Guy's and St. Thomas’ NHS Trust, London, UK.
Reprints: Christopher Limb, MBBS, MRes, MRCS, Worthing Hospital, Western Sussex NHS Trust, Lyndhurst Rd, Worthing BN11 2DH. E-mail: firstname.lastname@example.org.
The authors report no conflicts of interest.