Article first published online 25 November 2013
*Gastrointestinal Unit, Western General Hospital, Edinburgh, United Kingdom
†Princess Alexandra Eye Pavilion, Edinburgh, United Kingdom
‡Inverclyde Royal Hospital Greenock, Renfrewshire, United Kingdom
J. Satsangi has received research support from Abbie Vie and lecture fees from MSD. The authors have no other conflicts of interest to disclose.